Ecclesiastes 1:3-7

What does man gain by all the toil at which he toils under the sun? A generation goes, and a generation comes, but the earth remains forever. The sun rises, and the sun goes down, and hastens to the place where it rises. The wind blows to the south and goes around to the north; around and around goes the wind, and on its circuits the wind returns. All streams run to the sea, but the sea is not full; to the place where the streams flow, there they flow again.