When the wicked spring as the grass, and when all the workers of iniquity do flourish; it is that they shall be destroyed forever:
Read Chapter 92
Augustine of Hippo
AD 430
9. For this reason, after saying, "Thy thoughts are very deep," he at once subjoins: "An unwise man doth not well consider this, and a fool doth not understand it" (ver. 6). What are the things which an unwise man cloth not well consider, and which a fool doth not understand? "When the ungodly are green as the grass." What is, "as the grass"? They flourish when it is winter, but they will wither in the summer. Thou observest the flower of the grass? What more quickly passeth by? What is brighter? What is greener? Let not its verdure delight thee, but fear its withering. Thou hast heard of the ungodly being green as the grass: hear also of the righteous: "For lo." In the mean while, consider the ungodly; they flourish as the grass; but who are they who understand it not? The foolish and unwise. "When the ungodly are green as the grass, and all men look upon the workers of iniquity" (ver. 7). All who in their heart think not aright of God, look upon the ungodly when they are as green as ...
Appear. Hebrew, "flourish. "Still they are but as grass, (Haydock) short-lived, and of small utility. The just resembles the palm-tree, ver. 13. (Calmet)