'Heart' in the Bible

because, having known God they did not glorify Him as God, nor gave thanks, but were made vain in their reasonings, and their unintelligent heart was darkened,

but, according to thy hardness and impenitent heart, thou dost treasure up to thyself wrath, in a day of wrath and of the revelation of the righteous judgment of God,

but a Jew is he who is so inwardly, and circumcision is of the heart, in spirit, not in letter, of which the praise is not of men, but of God.

and thanks to God, that ye were servants of the sin, and -- were obedient from the heart to the form of teaching to which ye were delivered up;

that I have great grief and unceasing pain in my heart --

Brethren, the pleasure indeed of my heart, and my supplication that is to God for Israel, is -- for salvation;

and the righteousness of faith doth thus speak: 'Thou mayest not say in thine heart, Who shall go up to the heaven,' that is, Christ to bring down?

But what doth it say? 'Nigh thee is the saying -- in thy mouth, and in thy heart:' that is, the saying of the faith, that we preach;

that if thou mayest confess with thy mouth the Lord Jesus, and mayest believe in thy heart that God did raise him out of the dead, thou shalt be saved,

for with the heart doth one believe to righteousness, and with the mouth is confession made to salvation;