Mark 7:21-22
For within, out of the heart of men, proceed evil reasonings, adulteries, fornications, murders,
Matthew 10:33
But whosoever may deny me before the people, I will also deny him before my Father who is in the heavens.
Matthew 12:34-36
O ye generations of vipers, how are you, being evil, able to speak good things? for out of the abundance of the heart the mouth speaks.
Acts 5:3-4
But Peter said, Ananias, wherefore hath Satan filled thy heart to lie to the Holy Ghost, and keep back a part from the price of the land?
Romans 3:10-18
as has been written, There is no one good, not one:
Titus 1:16
They profess to know God, but deny him by their works, being abominable, and unbelieving, and reprobate unto every good work.
Hebrews 3:12
See, brethren, lest at some time there shall be in some one of you an evil heart of unbelief, in turning away from the living God:
James 1:15
Then the lust, conceiving, brings forth sin; and sin, having been perfected, produces death.
James 3:6
The tongue, a fire, the world of iniquity: the tongue sits down in the midst of our members, and corrupting the whole body, and setting on fire the course of nature; and it is set on fire from hell.