I am a stranger in the earth,.... As all his fathers were, and all the saints are; not to divine and spiritual things; to God, and communion with him; to Christ, and the knowledge of him; to the Spirit, and his operations in their hearts; to their own hearts, and the plague of them; to the Gospel, and its truths; nor to the people of God, and fellowship with them: but to the world, among whom they are, not being known, valued, and respected by them; and they also behaving as strangers to the world, having no fellowship with them in their sinful works; as also not being natives here, but belonging to another city and country, an heavenly one; see Ch1 29:15; hide not thy commandments from me; the doctrines of the Gospel, the word which God has commanded to a thousand generations; which is pure, and enlightens the eyes, and so needful to strangers in their pilgrimage, Psa 19:8; which God sometimes hides from the wise and prudent, and which the psalmist here deprecates with respect to himself, Mat 11:25. Or the precepts of the world may be meant, which are a light to the feet, and a lamp to the paths, a good direction to travellers and strangers in the way: David, being such an one, prayed that these might not be hid from him, but be showed unto him; that he might know his way, and not go out of it; but walk as a child of light, wisely and circumspectly.