All this I have seen, and I gave my heart to every work that is done under the sun. There is a time in which one man rules over another to his own hurt.

For he does not know what shall be; so who can tell him when it shall be?

I set my heart to know, and to search, and to seek out wisdom, and the reason of things, and to know the wickedness of folly, even of foolishness and madness;

For all his days are sorrows, and his task grief; yea, his heart does not take rest in the night. This also is vanity.

There is one alone, without a second; indeed, he has neither son nor brother; yet there is no end to all his labor; and his eyes are not satisfied with riches; and he does not ask, For whom do I labor and deprive my soul of good? This also is vanity; indeed, it is an evil task.

The sleep of a laboring man is sweet, whether he eats little or much; but the abundance of the rich will not allow him to sleep.

There I was: In the day the heat consumed me, and the frost by night, and my sleep fled from my eyes.

It is vain for you to rise up early, to sit up late, to eat the bread of sorrows; for so He gives His beloved sleep.