And I understood that man is able to find no explanation for all those works of God which are done under the sun. And so, the more that he labors to seek, so much the less does he find. Yes, even if a wise man were to claim that he knows, he would not be able to discover it
Other versions
King James Version
Then I beheld all the work of God, that a man cannot find out the work that is done under the sun: because though a man labour to seek it out, yet he shall not find itEnglish Standard Version
then I saw all the work of God, that man cannot find out the work that is done under the sun. However much man may toil in seeking, he will not find it out. Even though a wise man claims to know, he cannot find it out.New International Version
then I saw all that God has done. No one can comprehend what goes on under the sun. Despite all his efforts to search it out, man cannot discover its meaning. Even if a wise man claims he knows, he cannot really comprehend it.