Proverbs 4:1-27
Proverbs 4:23 Keep thy heart with all diligence; for out of it are the issues of life.
Verse 23 tells us to give attention to our heart: faint, foolish, willing, pure, heard, rebellious, sad, broken, heavy, rash, perfect, deceitful - what is your heart like today?
Our thoughts and intents don't origniate in our minds, but rather in our hearts. Consider these verses:
Zechariah 7:10
Matthew 9:4
Hebrews 4:12
Sin stems from the heart; we are born with "spiritual heart disease".
Matthew 15:19 "For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:"
The only cure for this disease is to turn to God, repent of our sins, believe on the Lord Jesus Christ, accept His payment on the cross of Calvary to pay our sin debt, and with our heart, believe on Him.
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."
"This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them; And their sins and iniquities will I remember no more. Now where remission of these is, there is no more offering for sin. Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus, By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh; And having an high priest over the house of God; Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water." - from Hebrews 10