καρδία

the heart, inner life, intention

Definition

Kardia refers to the center of human physical, emotional, intellectual, and spiritual life. In its literal sense, it is the physical heart (e.g., Acts 14:17). More significantly, it denotes the inner person—the seat of thoughts, feelings, and will. It is the source of moral character and intention, from which actions and words flow (Matthew 12:34-35). It can represent the mind and understanding (Mark 2:6), the seat of emotions like joy or sorrow (John 16:22), and the spiritual center where one relates to God, capable of being hardened (Mark 6:52) or made pure (Matthew 5:8).

Biblical Usage

Kardia is used throughout the New Testament, appearing most frequently in the Gospels, Acts, and Paul's letters. It describes the hidden inner life from which God judges (Luke 16:15), the place where faith resides (Romans 10:9-10), and the dwelling place of God's Spirit (Ephesians 3:17). Patterns include its use in teachings about sin (Matthew 15:19), renewal (Ezekiel 36:26 cited in 2 Corinthians 3:3), and the location of God's law (Romans 2:15).

Etymology

Derived from the Proto-Indo-European root *kerd- (heart), it is cognate with the Latin 'cor' (heart) and English 'cardiac.' In Greek, it retained its core meaning as the physical organ but expanded, as in Hebrew thought (Hebrew 'lev'), to encompass the entire inner person—mind, will, and emotions.

Semantic Range

Kardia is central to biblical anthropology and soteriology. It underscores that God's primary concern is the internal state of a person, not merely external behavior (1 Samuel 16:7). Key doctrines relate to human depravity (the heart is deceitful, Jeremiah 17:9), regeneration (God gives a new heart, Ezekiel 36:26), and the inner work of the Holy Spirit (pouring love into our hearts, Romans 5:5). Understanding kardia enriches reading by highlighting that biblical commands for love, faith, and purity are calls for transformation at the deepest level of human existence.

In the ancient Hebrew and Greek worldview, the heart (kardia/lev) was not primarily the seat of emotion as in modern times, but the holistic center of intellect, volition, and personality. This contrasts with the modern tendency to separate 'heart' (feeling) from 'mind' (thinking). For biblical authors, the heart was the integrated control center of the whole person.

psuchē (G5590) — the soul, life, or self; broader, encompassing the entire person. nous (G3563) — the mind, intellect, or understanding; more focused on cognitive faculties. splanchna (G4698) — the inward parts, often denoting deep compassion or affection. pneuma (G4151) — the spirit; can overlap but often refers to the non-material aspect directly relating to God.

Word Details

Scripture References