The instructions here given are very plain; much need not be said for the exposition of them, but there is a great deal to be done for the reducing of them to practice, and there they will look best. I. We are here cautioned against discontent at the prosperity and success of evil-doers ( Ps. 37:1 , 2 ): Fret not thyself, neither be thou envious . We may suppose that David speaks this to himself f...