Here is, 1. The close application which David made of the word of God
to himself: He hid it in his heart, laid it up there, that it might be
ready to him whenever he had occasion to use it; he laid it up as that
which he valued highly, and had a warm regard for, and which he was
afraid of losing and being robbed of. God's word is a treasure worth
laying up, and there is no laying it up safely but in our hearts; if we
have it only in our houses and hands, enemies may take it from us; if
only in our heads, our memories may fail us: but if our hearts be
delivered into the mould of it, and the impressions of it remain on our
souls, it is safe. 2. The good uses he designed to make of it: That I
might not sin against thee. Good men are afraid of sin, and are in care
to prevent it; and the most effectual way to prevent is to hide God's
word in our hearts, that we may answer every temptation, as our Master
did, with, It is written, may oppose God's precepts to the dominion of
sin, his promises to its allurements, and his threatenings to its
menaces.