9 So I was great and increased more than all that were before me in Jerusalem, and more than that, my wisdom remained with me.
10 And whatever my eyes desired I did not keep from them; I did not withhold my heart from any pleasure; for my heart rejoiced in all my labour, and this was my portion of all my labour.
11 At last I looked on all the works that my hands had wrought and on the labour that I had laboured to do; and, behold, all was vanity and vexation of spirit, and there was no profit under the sun.
12 And I turned myself to behold wisdom and those who are mad, and folly; for what can the man do that comes after the king? even that which has already been done.
13 And I have seen that wisdom excels folly as far as light excels darkness.
14 The wise man has his eyes in his head, but the fool walks in darkness: And I myself also understood that one event happens to the one and to the other.
15 Then I said in my heart, As it shall happen to the fool, so it shall happen even to me. Why have I worked until now to make myself wiser? Then I said in my heart that this also is vanity.