Charles H. Spurgeon on Psalms 90:6

In the morning. This can hardly mean "in early youth", as some of the Rabbis explain. The words, strictly speaking, are a part of the comparison ("they are as grass which springeth afresh in the morning"), and are only thus placed first to give emphasis to the figure. In the East, one night's rain works a change as if by magic. The field at evening was brown, parched, arid as a desert; in the morning it is green with the blades of grass. The scorching hot wind (Jas 1:11) blows upon it, and again before evening it is withered. —J.J.S. Perowne.