Verse 2. As God would have us keep His law as the apple of our eye, so He keeps His people (Deut. xxxii. 10), in answer to their prayer, as the apple of His eye (Zech. ii. 8). We guard the eye as our most precious and tender member from hurt, and prize it most dearly. As we guard the pupil of the eye from the least mote, which is sufficient to hurt it, so God's law is so tender and holy a thing that the least violation of it in thought, word, or deed, is sin; and we are so to keep the law as to avoid any violation of it. The law resembles the pupil of the eye also in its being spiritually the organ of light, without which we should be in utter darkness.--_Fausset._ The instruction of the Word is the same to the soul which the eye is to the body. For as the body without the sight of the eye runneth upon many things that hurt it, and falleth at every little stumbling-block, so the soul most fearfully runneth into sins if it want the light and direction of the Word.--_Muffet._ Man are off and on in their promises: they are also slow and slack in their performances. But it is otherwise here: the very "entrance of Thy Word giveth light" (Psa. cxix. 130), and the very onset of obedience giveth life. It is but "_Hear,_ and your soul shall live" (Isa. lv. 3). Sin is homogeneous, all of a kind, though not all of the same degree. As the least pebble is a stone as well as the hugest rock, and as the drop of a bucket is water as well as the main ocean, hence the least sins are in Scripture reproached by the names of the greatest. Malice is called manslaughter, lust, adultery, etc. Concupiscence is condemned by the law; even the first motions of sin, though they never come to consent (Rom. vii. 7). Inward bleeding may kill a man. The law of God is spiritual, though we be carnal. And as the sunshine shows us atoms and motes that till then we discerned not, so doth the law discover and censure smallest failings. It must therefore be kept curiously, even "as the apple of the eye," that cannot be touched, but will be distempered. Careful we must be, even in the punctilios of duty. Men will not lightly lose the least ends of gold.--_Trapp._ In some bodies, as trees, etc., there is life without sense, which are things animated, but not so much with a soul as with a kind of animation; even as the wicked have some kind of knowledge from grace, but are not animated by it. Or rather the wicked do not live, indeed, for life consisteth in action, and how can he be said truly to live whose words are dead? But keep God's commandments, and live indeed, live cheerfully with the comfort of this life, which makes life to be life; live happily in the life of glory hereafter, which is the end for which this life is lent us.--_Jermin._ Verse 4. Since, O youth, thou delightest in the intimacy of fair maidens, lo! here is by far the loveliest one, Wisdom.--_Cartwright._