How is the Word Living?

For the word of God is living and active and sharper than any two-edged sword, and piercing as far as the division of soul and spirit, of both joints and marrow, and able to judge the thoughts and intentions of the heart (Hebrews 4:12).

How is the word of God living? Matthew Henry, in his commentary on this passage, wrote:

...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...Saints die, and sinners die; but the word of God lives.

The word is living and powerful that it can convict. Henry continues:

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...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. 

The word is living that is can also cut. Henry explains:

It is the two-edged sword that cometh out of the mouth of Christ...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. 

The word is living that it can also discern. Once more, Henry:

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.