• Proverbs 26:23-26
  Fervent lips with a wicked heart
  Are like earthenware covered with silver dross.
  He who hates, disguises it with his lips,
  And lays up deceit within himself;
  When he speaks kindly, do not believe him,
  For there are seven abominations in his heart;
  Though his hatred is covered by deceit,
  His wickedness will be revealed before the assembly.
  
   
• Matthew 7:16-20
  You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Therefore by their fruits you will know them.
   
• Matthew 15:8-14
  " These people draw near to Me with their mouth,
  Andhonor Me with their lips,
  But their heart is far from Me.
  And in vain they worship Me,
  Teaching as doctrines the commandments of men."" When He had called the multitude to Himself, He said to them, “Hear and understand: Not what goes into the mouth defiles a man; but what comes out of the mouth, this defiles a man.” Then His disciples came and said to Him, “Do You know that the Pharisees were offended when they heard this saying?” But He answered and said, “Every plant which My heavenly Father has not planted will be uprooted. Let them alone. They are blind leaders of the blind. And if the blind leads the blind, both will fall into a ditch.'
   
• Isaiah 59:3-4
  For your hands are defiled with blood,
  And your fingers with iniquity;
  Your lips have spoken lies,
  Your tongue has muttered perversity.
  No one calls for justice,
  Nor does any plead for truth.
  They trust in empty words and speak lies;
  They conceive evil and bring forth iniquity.
  
   
• Matthew 13:24-30
  Another parable He put forth to them, saying: "The kingdom of heaven is like a man who sowed good seed in his field; but while men slept, his enemy came and sowed tares among the wheat and went his way. But when the grain had sprouted and produced a crop, then the tares also appeared. So the servants of the owner came and said to him, "Sir, did you not sow good seed in your field? How then does it have tares?" He said to them, "An enemy has done this." The servants said to him, "Do you want us then to go and gather them up?" But he said, "No, lest while you gather up the tares you also uproot the wheat with them. Let both grow together until the harvest, and at the time of harvest I will say to the reapers, "First gather together the tares and bind them in bundles to burn them, but gather the wheat into my barn."""
   
• Luke 12:1-3
  In the meantime, when an innumerable multitude of people had gathered together, so that they trampled one another, He began to say to His disciples first of all, "Beware of the leaven of the Pharisees, which is hypocrisy. For there is nothing covered that will not be revealed, nor hidden that will not be known. Therefore whatever you have spoken in the dark will be heard in the light, and what you have spoken in the ear in inner rooms will be proclaimed on the housetops.
   
• 2 Corinthians 11:13-15
  For such are false apostles, deceitful workers, transforming themselves into apostles of Christ. And no wonder! For Satan himself transforms himself into an angel of light. Therefore it is no great thing if his ministers also transform themselves into ministers of righteousness, whose end will be according to their works.
   
• 2 Peter 2:18-19
  For when they speak great swelling words of emptiness, they allure through the lusts of the flesh, through lewdness, the ones who have actually escaped from those who live in error. While they promise them liberty, they themselves are slaves of corruption; for by whom a person is overcome, by him also he is brought into bondage.
   

Related Scriptures

• John 8:44
  You are of your father the devil, and the desires of your father you want to do. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he speaks a lie, he speaks from his own resources, for he is a liar and the father of it.
   
• Job 31:33
  If I have covered my transgressions as Adam,
  By hiding my iniquity in my bosom,
   
• Psalm 15:1-3
  LORD, who may abide in Your tabernacle?
  Who may dwell in Your holy hill? He who walks uprightly,
  And works righteousness,
  And speaks the truth in his heart;
  He who does not backbite with his tongue,
  Nor does evil to his neighbor,
  Nor does he take up a reproach against his friend;
  
   
• John 1:47
  Jesus saw Nathanael coming toward Him, and said of him, "Behold, an Israelite indeed, in whom is no deceit!"
   
• Galatians 6:7-8
  Do not be deceived, God is not mocked; for whatever a man sows, that he will also reap. For he who sows to his flesh will of the flesh reap corruption, but he who sows to the Spirit will of the Spirit reap everlasting life.
   
• James 3:16-17
  For where envy and self-seeking exist, confusion and every evil thing are there. But the wisdom that is from above is first pure, then peaceable, gentle, willing to yield, full of mercy and good fruits, without partiality and without hypocrisy.