Here we have David’s testimony from his own experience, 1. Of the vanity of the world and its insufficiency to make us happy: I have seen an end of all perfection. Poor perfection which one sees an end of! Yet such are all those things in this world which pass for perfections. David, in his time, had seen Goliath, the strongest, overcome, Asahel, the swiftest, overtaken, Ahithophel, the wisest, befooled, Absalom, the fairest, deformed; and, in short, he had seen an end of perfection, of all perfection. He saw it by faith; he saw it by observation; he saw an end of the perfection of the creature both in respect of sufficiency (it was scanty and defective; there is that to be done for us which the creature cannot do) and in respect of continuance; it will not last our time, for it will not last to eternity as we must. The glory of man is but as the flower of the grass. 2. Of the fulness of the word of God, and its sufficiency for our satisfaction: But thy commandment is broad, exceedingly broad. The word of God reaches to all cases, to all times. The divine law lays a restraint upon the whole man, is designed to sanctify us wholly. There is a great deal required and forbidden in every commandment. The divine promise (for that also is commanded) extends itself to all our burdens, wants, and grievances, and has that in it which will make a portion and happiness for us when we have seen an end of all perfection.