Both low and high - Those alike of humble and those of exalted rank, for it pertains equally to all. On the meaning of the “terms” employed here, see the notes at Isaiah 2:9. These truths pertained to the “low;” that is, to those of humble rank, as teaching them not to envy the rich, and not to fear their power; and they pertained to those of exalted rank, as teaching them not to trust in their riches, and not to suppose that they could permanently possess and enjoy them.
Rich and poor together - As equally interested in these truths; that is, What the psalmist was about to say was adapted to impart useful lessons to both classes. Both needed instruction on the subject; and the same class of truths was adapted to furnish that instruction. The class of truths referred to was derived from the powerlessness of wealth in regard to the things of most importance to man, and from the fact that all which a man can gain must soon be left: teaching those of one class that they should not set their heart on wealth, and should not pride themselves on possessing it, and teaching the other class that they should not envy or fear the possessor of riches.