Tyndale Open Bible Dictionary

HEART

Vital bodily organ; emotional center of one’s being.

In Hebrew and Greek, as in modern English, “heart” is used to designate a physical organ as well as the emotional center of one’s being. “Heart” (Hebrew leb; Greek kardia) occurs approximately 1,000 times in the Bible, though it is often disguised in translation. The range of meaning is great.

Physical Heart

That the beating heart indicates life seems implied in 1 Samuel 25:37-39 (see NLT mg), despite the delay in Nabal’s death. Physical food and wine affect the heart (Jgs 19:5; Ps 104:15; Acts 14:17), and the heart can “faint” and “tremble.” The heart’s position in the body yields an obvious metaphor for “the center” (Mt 12:40).

Pyschological Heart

The heart attends intellectually (e.g., Jer 12:11); it also perceives (Jn 12:40), understands (1 Kgs 3:9), debates (Mk 2:6), reflects (Lk 2:19), remembers (Lk 2:51), thinks (Dt 8:17), imagines (Lk 1:51), is wise (Eccl 1:17, KJB), has technical skill (Ex 28:3, KJB), and much more.

Emotionally, the heart experiences intoxicated merriment (1 Sm 25:36), gladness (Is 30:29), joy (Jn 16:22), sorrow (Neh 2:2), anguish (Rom 9:2), bitterness (Prv 14:10), anxiety (1 Sm 4:13), despair (Eccl 2:20), love (2 Sm 14:1), trust (Ps 112:7), affection (2 Cor 7:3), lust (Mt 5:28), callousness (Mk 3:5), hatred (Lv 19:17), fear (Gn 42:28), jealousy (Jas 3:14), desire (Rom 10:1), discouragement (Nm 32:9), sympathy (Ex 23:9), anger (Dt 19:6, KJB), irresolution (2 Chr 13:7, KJB), and much more.

Volitionally, the heart can purpose (1 Cor 4:5), incline to (1 Sm 14:7), prompt (2 Kgs 12:4; cf. Prv 4:23), be steadfast (Acts 11:23), be willing (Ex 35:22), contrive evil (Acts 5:4), or follow its “treasure” (Mt 6:21).

Morally, the heart can be gentle, lowly (Mt 11:29), holy (1 Thes 3:13), faithful (Neh 9:8), upright (Ps 97:11), pure, single-minded (Jas 4:8), clean (Acts 15:8), loving toward God (Mk 12:30) and others (1 Pt 1:22), hardened, or sensitive (Ez 11:19). Scripture’s emphasis falls upon the heart’s evil (Gn 6:5 and throughout), as self-deceiving (Jas 1:26), deceitful (Jer 17:9), avaricious (Mt 6:19-21), lustful (Mt 5:28), arrogant (Is 9:9), impious (Acts 7:51), perverse (Ps 101:4), and impenitent (Rom 2:5). Nothing defiles a man worse than his own heart (Mk 7:18-19).

Yet out of the heart can come good (Lk 6:45; 8:15). Even when frustrated by circumstances or by fear, the heart’s good intention remains good; its evil intent, bad (1 Kgs 8:18; Mt 5:28).

Being so complex, a person’s heart is sadly divided, and Scripture often extols a perfect, whole, true (i.e., united) heart (Gn 20:5; Ps 86:11; Acts 8:37). The “heart” signifies the total inner self, a person’s hidden core of being (1 Pt 3:4), with which one communes, which one “pours out” in prayer, words, and deeds (Ps 62:8; Mt 15:18-19). It is the genuine self, distinguished from appearance, public position, and physical presence (1 Sm 16:7; 2 Cor 5:12; 1 Thes 2:17). And this “heart-self” has its own nature, character, and disposition (Dn 4:16; 7:4, KJB; cf. Mt 12:33-37).

The Spiritual Heart

The heart is especially important in biblical religion. The mystery of the hidden self is fully known to God and to Christ (Jer 17:10; Lk 9:47; Rom 8:27), and the heart is the seat of our knowledge of God (2 Cor 4:6). The state of heart governs the vision of God (Mt 5:8); from the heart one speaks to God (Ps 27:8); the heart is the locus of divine indwelling (2 Cor 1:22; Gal 4:6; Eph 3:17).

On the other hand, moral evil in the heart is seen in biblical perspective as sin against God. Senseless hearts are darkened, often secretly idolatrous, far from God, “not right” before God (Dt 29:18-19; Mt 15:8; Acts 8:21; Rom 1:21). Yet the Lord will not despise a broken, contrite heart (Ps 51:17). When one’s heart is turned toward God, he promises to make it sensitive to divine things, renewed and purified (Dt 4:29; 2 Kgs 23:25; Ps 51:10; Jl 2:13; Ez 36:25-27). God’s law shall then be written on the heart as the inward guide and incentive (Jer 31:33; Heb 8:10; cf. 2 Cor 3:2-3).

In Christian terms, such transformation involves believing the gospel from the “honest and good heart” that provides fruitful soil for the Word of God (Lk 8:15; Rom 10:9). The true heart draws near to God, loves him with all its intellect, feeling, and will (Lk 10:27; Heb 10:22). Then God gives strength, reward, renewal, grace, peace, and joy to the heart (Ps 73:26; Is 57:15; Acts 2:46; Phil 4:7; Heb 13:9). So the ancient ideal becomes possible again, that of being “a man after God’s own heart” (1 Sm 13:14; Acts 13:22).