Charles H. Spurgeon on Psalms 62:10

Set not your heart upon them. The word tyv properly is to place, to arrange in a fixed firm order, is specially used of the foundation stones of a building being placed fitly and firmly together... Therefore to set the heart upon riches is, to fix the mind closely and firmly upon them, to give it wholly up to them with all its powers; at the same time to be puffed up with confidence and arrogance, as Cl. Schultens observes. Hermann Venema.

Verses 10-12. Our estimate of man depends upon our estimate of God. David knows that men of low and high degree, if separated from the primal fount of every good, weigh nothing, and are less than nothing. Riches are nothing, especially ill gotten ones. Man is not to get proud when riches increase. But such is the course of things, that in proportion as the gifts of God are rich, men confide more in the gifts than in the rich giver. But holy David is better instructed. Once and again he has heard the divine voice in his soul, "that power belongeth unto God only." Job 33:14. This powerful God is merciful: can then any merit attach to our poor works? and yet the Lord rendereth to every pious man according to his imperfect pious work. Agustus F. Tholuck.