Corresponding Greek / Hebrew Entries: • H4221: מֹחַ (moach) • This Hebrew term refers to marrow and is used in the Old Testament to denote the innermost part of the bones, often symbolizing strength and vitality. It appears in passages such as Job 21:24, where it describes the physical health and prosperity of a person.

Usage: The term μυελός is used in the New Testament to describe the innermost part of the bones, often symbolizing vitality and strength. It appears in contexts that emphasize the deep, penetrating nature of God's word or spiritual truths.

Context: The Greek term μυελός appears in the New Testament in Hebrews 4:12, where it is used metaphorically to describe the penetrating power of the Word of God. The verse states, "For the word of God is living and active. Sharper than any double-edged sword, it pierces even to dividing soul and spirit, joints and marrow; it judges the thoughts and intentions of the heart" (BSB). Here, μυελός is part of a vivid metaphor illustrating how the Word of God can reach the deepest parts of a person's being, much like how a sword can penetrate to the marrow of bones. This usage underscores the idea that God's word is not only powerful but also discerning, capable of revealing and judging the innermost thoughts and intentions of individuals.

In the ancient world, marrow was considered a source of strength and vitality, and its mention in Hebrews highlights the comprehensive and profound impact of divine truth. The metaphor suggests that just as marrow is essential for physical life, so is the Word of God essential for spiritual life and health. The passage emphasizes the transformative and discerning nature of Scripture, which can reach and affect every aspect of human existence.