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 [it;] yea further; though a wise [man] think to know [it], yet shall he not be able to find [it].
Berean Study Bible (BSB) - Ecclesiastes 8:17 >I saw every work of God, and that a man is unable to comprehend the work that is done under the sun. Despite his efforts to search it out, he cannot find its meaning; even if the wise man claims to know, he is unable to comprehend.