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.
Jewish Publication Society of America Version (JPS1917) - Ecclesiastes 8:17 >then I beheld all the work of God, that 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.