Matthew 15:19
For out of the heart proceed wicked disputings, murders, adulteries, fornications, thefts, false-witnessings, slanders:
Acts 8:22
Repent therefore of this thy wickedness, and pray to God, if so be the thought of thine heart may be forgiven thee:
Matthew 5:28
but I tell you, that whosoever looketh on a woman, so as to lust after her, hath already debauched her in his heart.
Matthew 9:4
said to them, Why think ye evil in your hearts?
2 Corinthians 10:5
destroying false reasonings, and every height that is exalted against the knowledge of God, and captivating every thought to the obedience of Christ.