Hebrews 4:12

For the word of God is quick "Quick" is an old English expression for "living;" hence St Stephen speaks of Scripture as "the living oracles" (Acts 7:38). The "word of God" is not here the personal Logos; a phrase not distinctly and demonstrably adopted by any of the sacred writers except St John, who in the prologue to his Gospel calls Christ "the Word," and in the Apocalypse "the Word of God." The reference is to the written and spoken word of God, of the force and almost personality of which the writer shews so strong a sense. To him it is no dead utterance of the past, but a living power for ever. At the same time the expressions of this verse could hardly have been used by any one who was not familiar with the personification of the Logos, and St Clemens of Rome applies the words "a searcher of the thoughts and desires" to God. The passage closely resembles several which are found in Philo, though it applies the expressions in a different manner (see Introduction).

powerful Lit., effective, energetic. The vital power shews itself in acts.

sharper than any twoedged sword The same comparison is used by Isaiah (Isaiah 49:2) and St Paul (Ephesians 6:17) and St john (Revelation 2:16; Revelation 19:15). See too Wis 18:15-16, "Thine Almighty Word leaped down from heaven … and brought thine unfeigned commandment as a sharp sword." Philo compares the Logos to the flaming sword of Eden (Genesis 3:24) and "the fire and knife" (μἁχαιραν) of Genesis 22:6.

piercing even to the dividing asunder of soul and spirit, and of the joints and marrow The meaning is not that the word of God divides the soul (the "natural" soul) by which we live from thespirit by which we reason and apprehend; but that it pierces not only the natural soul, but even to the Divine Spirit of man, and even to the joints and marrow (i.e. to the inmost depths) of these. Thus Euripides (Hippol.527) speaks of the "marrow of the soul." It is obvious that the writer does not mean anything very specific by each term of the enumeration, which produces its effect by the rhetorical fulness of the expressions. The ψυχὴ or animal soul is the sphere of that life which makes a man ψυχικὸς, i.e. carnal, unspiritual; he possesses this element of life (anima) in common with the beasts. It is only by virtue of his spirit (πνεῦμα) that he has affinity with God.

a discerner of the thoughts and intents of the heart These words are a practical explanation of those which have preceded. The phraseology is an evident reminiscence of Philo. Philo compares the Word to the flaming sword of Paradise; and calls the Word "the cutter of all things," and says that "when whetted to the utmost sharpness it is incessantly dividing all sensuous things" (see Quis Rer. Div. Haeres& § 27; Opp. ed. Mangey i. 491, 503, 506). By enthumçseisis meant (strictly) our moral imaginations and desires; by ennoiaiour intellectual thoughts: but the distinction of meaning is hardly kept (Matthew 9:4, &c).