For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
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Hebrews 4:10-14
Tyndale Open Study Notes (CC BY-SA 4.0).
4:12-13 Echoing the call to hear God’s voice (3:7, 15; 4:7; quoted from Ps 95:7), the author gives a beautiful epigram on the power and penetration of God’s word. • alive and powerful: God’s word is an active, effective force. The word that created and governs the cosmos (Heb 1:2-3) can deal powerfully with people. • the sharpest two-edged sword: God’s word is able to penetrate the darkest recesses of people’s lives, exposing their innermost thoughts and desires (cp. Eph 6:17; Rev 1:16; 2:12, 16; 19:15).
Other Bible passages linked to this one, most cited first.
Is not my word like as a fire? saith the LORD; and like a hammer that breaketh the rock in pieces?
So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.
And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
The entrance of thy words giveth light; it giveth understanding unto the simple.
Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
And he hath made my mouth like a sharp sword; in the shadow of his hand hath he hid me, and made me a polished shaft; in his quiver hath he hid me;
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.