According to the Bible,
is the centre not only of spiritual activity, but of all the operations of human life.
"Heart" and "soul" are often used interchangeably (Deut. 6:5; 26:16
; comp. Matt. 22:37
; Mark 12:30, 33
), but this is not generally the case.
The heart is the "home of the personal life," and hence a man
is designated, according to his heart, wise (1 Kings 3:12
, etc.), pure (Ps. 24:4
; Matt. 5:8
, etc.), upright and righteous (Gen. 20:5, 6
; Ps. 11:2
; 78:72), pious and good (Luke 8:15
), etc. In these and such passages the word "soul" could not be substituted for "heart."
The heart is also the seat of the conscience
). It is naturally wicked (Gen. 8:21
), and hence it contaminates the whole life and character (Matt. 12:34; 15:18
; comp. Eccl. 8:11
; Ps. 73:7
). Hence the heart must be changed, regenerated (Ezek. 36:26; 11:19
; Ps. 51:10-14
), before a man can willingly obey God.
The process of salvation
begins in the heart by the believing reception of the testimony
while the rejection of that testimony hardens the heart (Ps. 95:8
; Prov. 28:14
; 2 Chr. 36:13
). "Hardness of heart evidences itself by light
views of sin;
partial acknowledgment and confession
of it; pride and conceit; ingratitude; unconcern about the word and ordinances of God; inattention to divine providences; stifling convictions of conscience; shunning reproof; presumption, and general ignorance of divine things."