In these last verses the Psalmist becomes a preacher, and gives admonitory lessons which he has himself gathered from experience. “Be not thou afraid when one is made rich.” Let it not give thee any concern to see the godless prosper. Raise no questions as to divine justice; suffer no foreboding to cloud thy mind. Temporal prosperity is too small a matter to be worth fretting about; The Treasury of David
The psalmist now exhorts us not to "be afraid when one becomes rich" or "when the glory of his house," his estate and family, increases. The reason for this is that death strips us naked (Psa_49:17) and His "glory," that is, his "heaviness" or "wealth," remains behind. "While he lives he blesses himself" or, literally, "he blesses his soul in his life," with self-congratulations, and receives the "praise" of others. In death, how ever, when he joins "the generation of his fathers," there is only darkness.