WHAT DOES THE BIBLE SAY ABOUT THE HEART OF MAN:
Jeremiah 17:9-10 - The heart [is] deceitful above all [things], and desperately wicked: who can know it?
Luke 6:45 - A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.
Proverbs 4:23 - Keep thy heart with all diligence; for out of it [are] the issues of life.
Psalms 51:10 - Create in me a clean heart, O God; and renew a right spirit within me.
Luke 8:15 - But that on the good ground are they, which in an honest and good heart, having heard the word, keep [it], and bring forth fruit with patience.
Ezekiel 36:26 - A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.
Mark 12:30 - And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this [is] the first commandment.
Psalm 119:11 - Thy word have I hid in mine heart, that I might not sin against thee.
Matthew 12:34 - O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.
Matthew 13:15 - For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Matthew 15:8 - This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me.
Matthew 15:18 - But those things which proceed out of the mouth come forth from the heart; and they defile the man.
Romans 10:9-10 - That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.