Mark 7:21-22
For from within, out of men's hearts, their evil purposes proceed--fornication, theft, murder, adultery,
Matthew 10:33
But whoever disowns me before men I also will disown before my Father who is in Heaven.
Matthew 12:34-36
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.
Acts 5:3-4
"Ananias," said Peter, "why has Satan taken possession of your heart, that you should try to deceive the Holy Spirit and dishonestly keep back part of the price paid you for this land?
Romans 3:10-18
Thus it stands written, "There is not one righteous man.
Titus 1:16
They profess to know God; but in their actions they disown Him, and are detestable and disobedient men, and for any good work are utterly useless.
Hebrews 3:12
see to it, brethren, that there is never in any one of you--as perhaps there may be--a sinful and unbelieving heart, manifesting itself in revolt from the ever-living God.
James 1:15
Then the passion conceives, and becomes the parent of sin; and sin, when fully matured, gives birth to death.
James 3:6
And the tongue is a fire. That world of iniquity, the tongue, is placed within us spotting and soiling our whole nature, and setting the whole round of our lives on fire, being itself set on fire by Gehenna.