Ecclesiastes 6:10-12

Whatever exists has already been named, and it is known what man is; for he cannot dispute with him who is stronger than he is. For there are many words which increase futility. What then is the advantage to a man? For who knows what is good for a man during his lifetime, during the few years of his futile life? He will spend them like a shadow. For who can tell a man what will be after him under the sun?