'Heart' in the Bible

For out of much tribulation and distress of heart I wrote to you, with many tears; not that ye may be grieved, but that ye may know the love which I have very abundantly towards you.

being manifested to be Christ's epistle ministered by us, written, not with ink, but the Spirit of the living God; not on stone tables, but on fleshy tables of the heart.

But unto this day, when Moses is read, the veil lies upon their heart.

For we do not again commend ourselves to you, but we are giving to you occasion of boast in our behalf, that ye may have such with those boasting in countenance, and not in heart.

Our mouth is opened to you, Corinthians, our heart is expanded.

but for an answering recompense, (I speak as to children,) let your heart also expand itself.

But thanks be to God, who gives the same diligent zeal for you in the heart of Titus.

each according as he is purposed in his heart; not grievingly, or of necessity; for God loves a cheerful giver.