Charles Spurgeon Commentary Hebrews 4:12

"For the word of God is living, and active, and sharper than any two-edged sword, and piercing even to the dividing of soul and spirit, of both joints and marrow, and quick to discern the thoughts and intents of the heart." — Hebrews 4:12 (ASV)

This verse may be interpreted with reference to the incarnate Word or to the inspired Word, and they are so closely united and related to one another that we need not attempt to separate them, but see Christ in the Word, and the Word in Christ, and learn that both Christ and the Word do for us all that the apostle here declares.