¹³ I applied my mind to study and to explore by wisdom all that is done under the heavens.^(A) What a heavy burden God has laid on mankind!^(B)

¹⁷ then I saw all that God has done.^(A) No one can comprehend what goes on under the sun. Despite all their efforts to search it out, no one can discover its meaning. Even if the wise claim they know, they cannot really comprehend it.^(B)