Ecclesiastes 1:3-7

What do people gain from all their labours at which they toil under the sun? Generations come and generations go, but the earth remains for ever. The sun rises and the sun sets, and hurries back to where it rises. The wind blows to the south and turns to the north; round and round it goes, ever returning on its course. All streams flow into the sea, yet the sea is never full. To the place the streams come from, there they return again.