Ecclesiastes 6:10 - 6:12
10 Whatever exists has already been named, and it is known what man is; and he cannot dispute with him who is stronger than he is. 11 For there are many words which increase vanity. What then is the advantage to a man? 12 For who knows what is good for a man during his lifetime, during the few days of his vain life? He will make do with them like a shadow. For who can tell a man what will be after him under the sun?