Jesus used the parable of the sower to illustrate the process of spiritual birth, growth, and development. Jesus said:

“A sower went out to sow his seed. And as he sowed, some fell along the path and was trampled underfoot, and the birds of the air devoured it. And some fell on the rock, and as it grew up, it withered away, because it had no moisture. And some fell among thorns, and the thorns grew up with it and choked it. And some fell into good soil and grew and yielded a hundredfold.” (Luke 8:5-8)

Jesus later explained the parable of the sower to his disciples. He told them:

“The seed is the word of God. The ones along the path are those who have heard; then the devil comes and takes away the word from their hearts, so that they may not believe and be saved. And the ones on the rock are those who, when they hear the word, receive it with joy. But these have no root; they believe for a while, and in time of testing fall away. And as for what fell among the thorns, they are those who hear, but as they go on their way they are choked by the cares and riches and pleasures of life, and their fruit does not mature. As for that in the good soil, they are those who, hearing the word, hold it fast in an honest and good heart, and bear fruit with patience.” (Luke 8:11-15)

Jesus’ illustration and explanation showed that spiritual birth does not happen automatically when a person hears the word of God. A person must believe in order to be saved, but there is more to the process than just that. Jesus indicated that the word of God must take root in a person’s life and then, bear fruit so that their faith is evident to everyone around them. Jesus took his illustration one step further when he told his disciples:

“The hour has come for the Son of Man to be glorified. Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit. Whoever loves his life loses it, and whoever hates his life in this world will keep it for eternal life. If anyone serves me, he must follow me; and where I am, there will my servant be also. If anyone serves me, the Father will honor him.” (John 12:23-26)

In his first letter to the Corinthians, Paul talked about the resurrection of Christ and the resurrection of the dead in general terms (1 Corinthians 15:1-34), and then, Paul went on to explain how the transformation of physical life into spiritual life actually takes place. Paul said:

But someone will ask, “How are the dead raised? With what kind of body do they come?” You foolish person! What you sow does not come to life unless it dies. And what you sow is not the body that is to be, but a bare kernel, perhaps of wheat or of some other grain. But God gives it a body as he has chosen, and to each kind of seed its own body. For not all flesh is the same, but there is one kind for humans, another for animals, another for birds, and another for fish. There are heavenly bodies and earthly bodies, but the glory of the heavenly is of one kind, and the glory of the earthly is of another. There is one glory of the sun, and another glory of the moon, and another glory of the stars; for star differs from star in glory. So is it with the resurrection of the dead. What is sown is perishable; what is raised is imperishable. It is sown in dishonor; it is raised in glory. It is sown in weakness; it is raised in power. It is sown a natural body; it is raised a spiritual body. If there is a natural body, there is also a spiritual body. Thus it is written, “The first man Adam became a living being”; the last Adam became a life-giving spirit. But it is not the spiritual that is first but the natural, and then the spiritual. The first man was from the earth, a man of dust; the second man is from heaven. As was the man of dust, so also are those who are of the dust, and as is the man of heaven, so also are those who are of heaven. Just as we have borne the image of the man of dust, we shall also bear the image of the man of heaven. (1 Corinthians 15:35-49)

Paul reiterated Jesus’ point that “What you sow does not come to life unless it dies” (1 Corinthians 15:36). Paul’s explanation made it clear that there are two types of bodies (1 Corinthians 15:44) and therefore it can be assumed, two types of death that need to take place in order for the transformation of our physical life into an eternal spiritual life to be complete.

Jesus told Martha shortly before he raised her brother Lazarus from the dead, “I am the resurrection and the life. Whoever believes in me, though he die, yet shall he live, and everyone who lives and believes in me shall never die” (John 11:25-26). Jesus wanted Martha to understand that spiritual life and spiritual death are more important than physical life and death when it comes to eternal existence. Jesus indicated that everyone who has experienced a spiritual birth will never experience a natural death (John 11:26). The Greek word that is translated die in John 11:26, apothnesko (ap-oth-naceˊ-ko) “is used of the separation of the soul from the body, i.e. the natural ‘death’ of human beings (e.g., Matthew 9:24; Romans 7:2); by reason of descent from Adam (1 Corinthians 15:22)…all who are descended from Adam not only ‘die’ physically, owing to sin, see above, but are naturally in a state of separation from God, 2 Corinthians 5:14. From this believers are freed both now and eternally, John 6:50; 11:26, through the death of Christ, Romans 5:8” (G599).

In the same way that a person who has experienced a spiritual birth will never experience a natural death, so a person that has experienced a spiritual death will not experience a natural life, but a supernatural type of existence similar to God’s. Jesus said, “Whoever believes in me, though he die, yet shall he live” (John 11:25). The Greek word that is translated live, zao (dzahˊ-o) means “spiritual life” and refers to “the present state of departed saints” and in particular to “the way of access to God through the Lord Jesus Christ” (G2198). With regard to physical life, zao means “the recovery of physical life from the power of death” and is sometimes translated quick in reference to God’s word. “Quick implies the ability to respond immediately to God’s word and living stresses the ongoing nature of His word; it is just as effective today as tomorrow.” John emphasized that Jesus and God’s word are one and the same. John said, “In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through him, and without him was not any thing made that was made. In him was life, and the life was the light of men. The light shines in the darkness, and the darkness has not overcome it” (John 1:1-5).

When Jesus said, “Whoever believes in me, though he die, yet shall he live” (John 11:25), he was talking about the effect of God’s word on the soul of a man. Unlike physical death, spiritual death is an ongoing process that starts when a person accepts Jesus as his or her Savior and continues until a physical death or the rapture, allassō (al-lasˊ-so) takes place (G236). Paul said:

I tell you this, brothers: flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable. Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised imperishable, and we shall be changed. For this perishable body must put on the imperishable, and this mortal body must put on immortality. When the perishable puts on the imperishable, and the mortal puts on immortality, then shall come to pass the saying that is written:

“Death is swallowed up in victory.”
“O death, where is your victory?
    O death, where is your sting?”

The sting of death is sin, and the power of sin is the law. But thanks be to God, who gives us the victory through our Lord Jesus Christ. (1 Corinthians 15:50-57)

With regard to spiritual death, “Believers have spiritually ‘died’ to the Law as a means of life, Galatians 2:19; Colossians 2:20; to sin, Romans 6:2, and in general to all spiritual association with the world and with that which pertained to their unregenerate state, Colossians 3:3, because of their identification with the ‘death’ of Christ, Romans 6:8” (G599). Paul said, “For through the law I died to the law, so that I might live to God. I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me. I do not nullify the grace of God, for if righteousness were through the law, then Christ died for no purpose” (Galatians 2:19-21).

Paul used the Greek word zao when said that it was no longer he who lived, but Christ who lived in him and that the life Paul lived in the flesh he lived by faith. Our spiritual life and spiritual death are closely connected to our faith in Jesus Christ. One of the things that seems to be particularly important in the establishment and development of our faith is obedience to God’s word. When Jesus performed miracles, he often instructed the person who wanted to get well to do something so that his obedience became a part of the healing process. Jesus instructed the man who was born blind to, “’Go, wash in the pool of Siloam’ (which means Sent). So he went and washed and came back seeing” (John 9:7). On another occasion, Jesus told a man that had been an invalid for 38 years, “Get up, take up your bed, and walk” (John 5:8). In the same way that faith in action can produce miraculous results, a denial of God’s word or unbelief disconnects us from Jesus, the source of our spiritual life and power (John 8:21).

In order to put a stop to Jesus’ ministry, the Jews “agreed that if anyone should confess Jesus to be the Christ, he was to be put out of the synagogue” (John 9:22). The Greek word that is translated confess, homologeo (hom-ol-og-ehˊ-o) literally means “to speak the same thing,” but the specific connotation in John 9:22 is “to declare openly by way of speaking out freely, such confession being the effect of deep conviction of facts” (G3670). In other words, the Jews didn’t necessarily care if people believed that Jesus was the Christ, they just wanted to stop people from saying that they believed Jesus was the Christ. Their issue was with believers making a public profession of faith. Jesus told his followers, “So everyone who acknowledges me before men. I also will acknowledge before my Father who is in heaven, but whoever denies me before men, I also will deny before my Father who is in heaven” (Matthew 10:32-33). The denial that Jesus was talking about was the contradiction of a previous oath, to disavow oneself of a former commitment. John’s record of Peter’s denial of Christ states, “Now Simon Peter was standing and warming himself. So they said to him, ‘You also are not one of his disciples, are you?’ He denied it and said, ‘I am not” (John 18:25).

A Jewish oath was “a sacred promise attesting to what one has done or will do” and was also used “to pledge loyalty to God” (H7621). Matthew’s gospel indicates that Peter denied Jesus with an oath, stating, “I do not know the man” (Matthew 26:72). According to the Mosaic Law, if a man swore with an oath, to bind himself by a pledge, it was impossible for the man to unbind himself, meaning that he couldn’t be forgiven if he didn’t do what he promised to (Numbers 30:2). After Jesus was resurrected, he discovered that Peter had returned to his former occupation as a fisherman (John 21:7). Peter may have thought that his denial of Christ had disqualified him from the ministry, but Jesus loving restored him and repeated his original command, saying to Peter, “Follow me” (John 21:19). Similar to the Greek word homologeo, which means “to speak the same thing” (G3670), the Greek word that is translated follow, akoloutheo (ak-ol-oo-thehˊo) means “to be in the same way with” (G190). Jesus’ command to Peter to follow me was essentially a command to restore fellowship with him. Jesus wanted Peter to get back to doing what he was supposed to be doing, preaching the gospel (John 21:15).

The Jews unbelief was primary attributed to their spiritual blindness. Jesus said that the ruler of this world, Satan needed to be cast out in order for the Jews fellowship with God to be completely restored (John 12:31-32). John wrote:

When Jesus had said these things, he departed and hid himself from them. Though he had done so many signs before them, they still did not believe in him, so that the word spoken by the prophet Isaiah might be fulfilled:

“Lord, who has believed what he heard from us,
    and to whom has the arm of the Lord been revealed?”

Therefore they could not believe. For again Isaiah said,

“He has blinded their eyes
    and hardened their heart,
lest they see with their eyes,
    and understand with their heart, and turn,
    and I would heal them.” (John 12:36-40)

John said that the Jews “could not believe” (John 12:39). In other words, it was impossible for the Jews to put their trust in Jesus, but then, he went on to say, “Nevertheless, many even of the authorities believed in him, but for fear of the Pharisees they did not confess it, so that they would not be put out of the synagogue; for they loved the glory that comes from man more than the glory that comes from God” (John 12:42-43). John indicated that the problem was not that the Jews couldn’t believe, but that their leaders had set a bad example for them by refusing to make a public confession of their belief in Jesus because they didn’t want to be put out of the synagogue.

The dilemma for the Jews seemed to be that they were caught in the middle of two ways of thinking about how they could obtain eternal life. The Jews thought “they were God’s ‘spiritual’ children because they were Abraham’s physical children” (note on John 8:41), but Jesus taught them that they needed to experience a spiritual birth (John 3:5) in order to obtain eternal life (John 3:13-15). Jesus said the only way anyone could know for sure that he had received salvation was by the evidence of his works. John 3:19-21 states:

“And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil. For everyone who does wicked things hates the light and does not come to the light, lest his works should be exposed. But whoever does what is true comes to the light, so that it may be clearly seen that his works have been carried out in God.”

James elaborated on Jesus’ statement in his letter to the Jewish believers. James stated:

What good is it, my brothers, if someone says he has faith but does not have works? Can that faith save him? If a brother or sister is poorly clothed and lacking in daily food, and one of you says to them, “Go in peace, be warmed and filled,” without giving them the things needed for the body, what good is that? So also faith by itself, if it does not have works, is dead. (James 2:14-17)

The Greek word that James used that is translated dead, nekros (nekˊ-ros) “is used of the death of the body, cf. James 2:26, its most frequent sense, the actual spiritual condition of unsaved men” (G3498). The point James was trying to make was that the evidence of spiritual life is spiritual activity. If there is no spiritual activity going on, then a person cannot truly have been born again.

Jesus continually reminded the Jews that everything he was doing was being done in obedience to his Father. Jesus said, “For I have not spoken on my own authority, but the Father who sent me has himself given me a commandment – what to say and what to speak. And I know that his commandment is eternal life. What I say, therefore, I say as the Father has told me” (John 12:49-50). Jesus explained that his words were an ongoing confession because he was always speaking “the same thing” (G3670) that his Father told him to. As followers of Christ, we do the same thing Jesus did when we say what the Holy Spirit prompts us to. The writer of Hebrews encouraged believers to confess their faith on a regular basis so that the assurance of their salvation would give them confidence to not grow weary or fainthearted in their struggle against sin (Hebrews 10:23; 12:3-4). In that sense, confession of our faith is like an exercise that strengthens our spiritual muscles. The more we do it, the more agility and endurance we develop in our walk with the Lord.