For The Word Of God Is Living And Powerful
For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart. Hebrews 4:12 NKJV
By the word of God we may understand either the essential or the written word: the essential Word, that in the beginning was with God, and was God (John 1:1), the Lord Jesus Christ, and indeed what is said in this verse is true concerning him but most understand it of the written word, the holy scriptures, which are the word of God. Now of this word it is said, that is quick it is very lively and active, in all its efforts, in seizing the conscience of the sinner, in cutting him to the heart, and in comforting him and binding up the wounds of the soul. Those know not the word of God who call it a dead letter it is quick, compared to the light, and nothing quicker than the light it is not only quick, but quickening it is a vital light it is a living word, zon. Saints die, and sinners die but the word of God lives. All flesh is grass, and all the glory thereof as the flower of grass. The grass withereth, and the flower thereof falleth away, but the word of the Lord endureth for ever, 1 Peter 1:24,25. Your fathers, where are they? And the prophets, do they live for ever? But my words, which I commanded the prophets, did they not take hold of your fathers? Zechariah 1:5,6.
It is powerful. When God sets it home by his Spirit, it convinces powerfully, converts powerfully, and comforts powerfully. It is so powerful as to pull down strong holds (2 Corinthians 10:4,5), to raise the dead, to make the deaf to hear, the blind to see, the dumb to speak, and the lame to walk. It is powerful to batter down Satan's kingdom, and to set up the kingdom of Christ upon the ruins thereof.
It is sharper than any two-edged sword it cuts both ways it is the sword of the Spirit, Ephesians 6:17. It is the two-edged sword that cometh out of the mouth of Christ, Revelation 1:16. It is sharper than any two-edged sword, for it will enter where no other sword can, and make a more critical dissection: it pierces to the dividing asunder of the soul and the spirit, the soul and its habitual prevailing temper it makes a soul that has been a long time of a proud spirit to be humble, of a perverse spirit to be meek and obedient. Those sinful habits that have become as it were natural to the soul, and rooted deeply in it, and become in a manner one with it, are separated and cut off by this sword. It cuts off ignorance from the understanding, rebellion from the will, and enmity from the mind, which, when carnal, is enmity itself against God. This sword divides between the joints and the marrow, the most secret, close, and intimate parts of the body this sword can cut off the lusts of the flesh as well as the lusts of the mind, and make men willing to undergo the sharpest operation for the mortifying of sin.
It is a discerner of the thoughts and intents of the heart, even the most secret and remote thoughts and designs. It will discover to men the variety of their thoughts and purposes, the vileness of them, the bad principles they are actuated by, the sinister and sinful ends they act to. The word will turn the inside of a sinner out, and let him see all that is in his heart. Now such a word as this must needs be a great help to our faith and obedience. - Matthew Henry