Matthew 23:28
The same is true of you: outwardly you seem to the human eye to be good and honest men, but, within, you are full of insincerity and disregard of God's Law.
Matthew 23:5
And everything they do they do with a view to being observed by men; for they widen their phylacteries and make the tassels large,
Matthew 12:34-35
O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.
Matthew 15:19-20
For out of the heart proceed wicked thoughts, murder, adultery, fornication, theft, perjury, impiety of speech.
Mark 7:21-23
For from within, out of men's hearts, their evil purposes proceed--fornication, theft, murder, adultery,
Luke 16:15
"You are they," He said to them, "who boast of their own goodness before men, but God sees your hearts; for that which holds a proud position among men is detestable in God's sight.
Hebrews 4:12-13
For God's Message is full of life and power, and is keener than the sharpest two-edged sword. It pierces even to the severance of soul from spirit, and penetrates between the joints and the marrow, and it can discern the secret thoughts and purposes of the heart.