1:4-8 All things change, and never rest. Man, after all his labour, is no nearer finding rest than the sun, the wind, or the current of the river. His soul will find no rest, if he has it not from God. The senses are soon tired, yet still craving what is untried.

4. earth … for ever—(Ps 104:5). While the earth remains the same, the generations of men are ever changing; what lasting profit, then, can there be from the toils of one whose sojourn on earth, as an individual, is so brief? The "for ever" is comparative, not absolute (Ps 102:26).