MKJV(i)
15 Then I praised gladness, because a man has no better thing under the sun than to eat and to drink and to be glad; for that shall go with him of his labor for the days of his life which God gives him under the sun.
16 When I gave my heart to know wisdom, and to see the business that is done on the earth; for neither day nor night do men see sleep with their eyes.
17 Then I looked at all the work of God, that a man cannot find out the work that is done under the sun; because though a man labors to seek it out, yet he shall not find it. Yea, further, though a wise one speaks of knowing, yet he shall not be able to find it.