Matthew 23:28
Even so you also outwardly appear righteous unto men, but within you are full of hypocrisy and iniquity.
Matthew 23:5
But all their works they do to be seen of men: they make broad their phylacteries, and enlarge the borders of their garments,
1 Samuel 16:7
But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the LORD sees not as man sees; for man looks on the outward appearance, but the LORD looks on the heart.
Psalm 51:6
Behold, you desire truth in the inward parts: and in the hidden part you shall make me to know wisdom.
Jeremiah 17:9-10
The heart is deceitful above all things, and desperately wicked: who can know it?
Matthew 12:34-35
O generation of vipers, how can you, being evil, speak good things? for out of the abundance of the heart the mouth speaks.
Matthew 15:19-20
For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:
Mark 7:21-23
For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,
Luke 16:15
And he said unto them, You are they who justify yourselves before men; but God knows your hearts: for that which is highly esteemed among men is abomination in the sight of God.
Hebrews 4:12-13
For the word of God is living, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.