Mark 7:21-22
For from within, out of the heart of men, come evil thoughts, fornications, theft, murder, adultery,
Matthew 10:33
But whoever denies me before men, I will also deny him before my Father who is in heaven.
Matthew 12:34-36
You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
Acts 5:3-4
But Peter said, "Ananias, why has Satan filled your heart to lie to the Holy Spirit and to keep back some of the price of the land?
Romans 3:10-18
As it is written: "There is none righteous, no, not one;
Titus 1:16
They profess to know God, but they deny him by their deeds; they are detestable and disobedient, unfit for any good deed.
Hebrews 3:12
Take care, brethren, lest there be in any one of you an evil, unbelieving heart, leading you to fall away from the living God.
James 1:15
Then when desire has conceived, it gives birth to sin; and when sin is full-grown, it brings forth death.
James 3:6
And the tongue is a fire, a world of evil among the members of the body. The tongue corrupts our whole person, sets the whole course of our life on fire, and is itself set on fire by hell.