Jesus’ frustration with the hypocrisy of the Jewish religious leaders was evident in his response to their inquisition into his teaching and ministry. When he was asked, “Why do your disciples not walk according to the traditions of the elders, but eat with defiled hands?” (Mark 7:5), Jesus told the scribes and Pharisees, “Well did Isaiah prophesy of you hypocrites, as it is written, ‘This people honors me with their lips, but their heart is far from me; in vain do they worship me, teaching as doctrines the commandments of men’” (Mark 6-7). Jesus pointed to the inconsistency between the Jews’ worship of God and what was in their hearts. Jesus said, the Jews’ hearts were far from God, and in vain did they worship him. The Greek word that is translated vain, maten (matˊ-ane) is a derivative of mataios “through the idea of tentative manipulation, i.e. unsuccessful search, or else of punishment); folly, i.e. (adverb) to no purpose” (G3155). The scribes and Pharisees’ worship was not intended to bring them closer to God, but only to give the impression to others that they were close to the LORD. Jesus indicated that their worship was an empty, futile effort.

Jesus went on to explain that the scribes and Pharisees had established traditions that contradicted the Ten Commandments, giving the people of Israel the false impression that it was alright for them to bend the rules. Jesus used a parable to drive home his point that the condition of an individual’s heart is what really mattered to God. Jesus explained to his disciples:

“Then are you also without understanding? Do you not see that whatever goes into a person from outside cannot defile him, since it enters not his heart but his stomach, and is expelled?” (Thus he declared all foods clean.) And he said, “What comes out of a person is what defiles him. For from within, out of the heart of man, come evil thoughts, sexual immorality, theft, murder, adultery, coveting, wickedness, deceit, sensuality, envy, slander, pride, foolishness. All these evil things come from within, and they defile a person.” (Mark 7:18-23)

Jesus linked a person’s actions to his thoughts and said, “What comes out of a person is what defiles him” (Mark 7:20). The Greek word that Jesus used, koinoo (koy-noˊ-o), which is translated defiles, is derived from the word koinos (koy-nosˊ), the base word for the terms koinonia (koy-nohn-eeˊah) and koinonos (koy-no-nosˊ). Koinonia has to do with fellowship and communion with Christ (G2842). Jesus’ reference to becoming defiled was likely meant as false fellowship or believers being connected to unbelievers instead of to each other and Christ.

Jesus’ accusation against the scribes and Pharisees contained both positive and negative aspects. Isaiah’s prophecy stated, “This people honors me with their lips, but their heart is far from me” (Mark 7:6). The Jewish religious leaders were half right in that they were honoring God with their lips, but because their hearts were not right with God, it appeared that they were only giving him lip service, a verbal but insincere expression of their agreement with God’s commandments. In his letter to Titus, the Apostle Paul made note of the fact that there were many who were teaching false doctrine and claiming to be Christians who were not. Paul said:

For there are many who are insubordinate, empty talkers and deceivers, especially those of the circumcision party. They must be silenced, since they are upsetting whole families by teaching for shameful gain what they ought not to teach…To the pure, all things are pure, but to the defiled and unbelieving, nothing is pure; but both their minds and their consciences are defiled. They profess to know God, but they deny him by their works. They are detestable, disobedient, unfit for any good work. (Titus 1:10-16)

Paul indicated that unbelievers may profess to know God, but will demonstrate whether or not they are a follower of Christ by their actions. The Greek word that is translated deny in Titus 1:16, arneomai (ar-nehˊ-om-ahee) means “to contradict, i.e. disavow, reject, abnegate” (G720).

The people of Israel demonstrated their denial of God for many years before they were taken into captivity. In the desperate years leading up to Israel’s conquest by the Assyrians, the Israelites resorted to cannibalism and the king of Israel, rather than repenting and seeking God’s help, threatened to kill the prophet Elisha because of the nation’s problems. Second Kings 6:24-31 states:

Afterward Ben-hadad king of Syria mustered his entire army and went up and besieged Samaria. And there was a great famine in Samaria, as they besieged it, until a donkey’s head was sold for eighty shekels of silver, and the fourth part of a kab of dove’s dung for five shekels of silver. Now as the king of Israel was passing by on the wall, a woman cried out to him, saying, “Help, my lord, O king!” And he said, “If the Lord will not help you, how shall I help you? From the threshing floor, or from the winepress?” And the king asked her, “What is your trouble?” She answered, “This woman said to me, ‘Give your son, that we may eat him today, and we will eat my son tomorrow.’ So we boiled my son and ate him. And on the next day I said to her, ‘Give your son, that we may eat him.’ But she has hidden her son.” When the king heard the words of the woman, he tore his clothes—now he was passing by on the wall—and the people looked, and behold, he had sackcloth beneath on his body—and he said, “May God do so to me and more also, if the head of Elisha the son of Shaphat remains on his shoulders today.”

The king of Israel appeared to be mourning when he tore his clothes in response to the woman’s trouble, but his threat to kill Elisha, who was God’s appointed spokesman, contradicted his action and showed that his heart was hardened toward God.

The Apostle John described having fellowship with God as walking in the light. John said:

This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all. If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin. If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If we say we have not sinned, we make him a liar, and his word is not in us. (1 John 1:5-10)

John said that confessing our sins will result in God forgiving our sins because he is faithful and just, but John also indicated that denying our sins makes God a liar, proving that his word is not in us.

Jesus used the example of a tree and its fruit to illustrate his point to the Pharisees that the heart was the source of each person’s thoughts and actions. Jesus said, “Either make the tree good and its fruit good, or make the tree bad and its fruit bad, for the tree is known by its fruit. You brood of vipers! How can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks. The good person out of his good treasure brings forth good and the evil person out of his evil treasure brings forth evil. I tell you on the day of judgment people will give account for every careless word they speak, for by your words you will be justified, and by your words you will be condemned” (Matthew 12:33-37). Jesus’ emphasis on the words that we speak had to do with a key aspect of salvation, confession or rather making a profession of faith. Paul explained this aspect of salvation in his letter to the Romans. Paul said:

For Moses writes about the righteousness that is based on the law, that the person who does the commandments shall live by them. But the righteousness based on faith says, “Do not say in your heart, ‘Who will ascend into heaven?’” (that is, to bring Christ down) “or ‘Who will descend into the abyss?’” (that is, to bring Christ up from the dead). But what does it say? “The word is near you, in your mouth and in your heart” (that is, the word of faith that we proclaim); because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. For with the heart one believes and is justified, and with the mouth one confesses and is saved. (Romans 10:5-10)

Paul indicated that believing originates in the heart, but it is with the mouth that one confesses and is saved. The Greek word that is translated confesses, homologeo (hom-ol-og-ehˊ-o) means “To speak or say the same with another, e.g., to say the same thing, i.e. to assent, accord, to agree with” and also “to promise” (G3670). When a person confesses that Jesus is Lord, he is agreeing with what is written in the Bible, the inspired word of God. If the person believes in his heart what he is saying is true; it is not just lip service, but a promise, an actual profession of faith and will result in the person being saved.