Ecclesiastes 6:10-14

Whatever exists has already been named, and it is known what man is; for he cannot dispute with the one who is mightier than he is.

For there are many words which increase futility. What then is the advantage to a person?

For who knows what is good for a person during his lifetime, during the few years of his futile life? He will spend them like a shadow. For who can tell a person what will happen after him under the sun?