'Heart' in the Bible

Grace to you and peace [inner calm and spiritual well-being] from God our Father and the Lord Jesus Christ.

But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.

But the natural [unbelieving] man does not accept the things [the teachings and revelations] of the Spirit of God, for they are foolishness [absurd and illogical] to him; and he is incapable of understanding them, because they are spiritually discerned and appreciated, [and he is unqualified to judge spiritual matters].

For who has known the mind and purposes of the Lord, so as to instruct Him? But we have the mind of Christ [to be guided by His thoughts and purposes].

For this reason let there be no judging before the time, till the Lord comes, who will make clear the secret things of the dark, and the designs of the heart; and then will every man have his praise from God.

Every one of you already has all that heart can desire; already you have grown rich; without waiting for us, you have ascended your thrones! Yes indeed, would to God that you had ascended your thrones, that we also might reign with you!

Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.

If, so far as I am concerned, I partake with a grateful heart, why am I to be found fault with in regard to a thing for which I give thanks?"

And thus are the secrets of his heart made manifest; and so falling down on his face he will worship God, and report that God is in you of a truth.