New Revised Standard Version
then I saw all the work of God, that no one can find out what is happening under the sun. However much they may toil in seeking, they will not find it out; even though those who are wise claim to know, they cannot find it out.

Contemporary English Version
I saw everything God does, and I realized no one can really understand what happens. We may be very wise, but no matter how much we try or how much we claim to know, we cannot understand it all.

New American Bible
and I saw all the work of God: No mortal can find out the work that is done under the sun. However much mortals may toil in searching, no one finds it out; and even if the wise claim to know, they are unable to find it out.

Douay-Rheims Bible
And I understood that man can find no reason of all those works of God that are done under the sun: and the more he shall labour to seek, so much the less shall he find: yea, though the wise man shall say, that he knoweth it, he shall not be able to find it.

And I understood that man can find no reason of all those works of God that are done under the sun: and the more he shall labour to seek, so much the less shall he find: yea, though the wise man shall say, that he knoweth it, he shall not be able to find it.

that a man

Ecclesiastes 3:11 He hath made all things good in their time, and hath delivered the world to their consideration, so that man cannot find out the work which God hath made from the beginning to the end.

Ecclesiastes 7:23,24 I have tried all things in wisdom. I have said: I will be wise: and it departed farther from me, . . .

Ecclesiastes 11:5 As thou knowest not what is the way of the spirit, nor how the bones are joined together in the womb of her that is with child: so thou knowest not the works of God, who is the maker of all.

Job 5:9 Who doth great things, and unsearchable and wonderful things without number:

Job 11:7-9 Peradventure thou wilt comprehend the steps of God, and wilt find out the Almighty perfectly? . . .

Psalm 40:5 Thou hast multiplied thy wonderful works, O Lord my God: and in thy thoughts there is no one like to thee. I have declared and I have spoken they are multiplied above number.

Psalm 73:16 I studied that I might know this thing, it is a labour in my sight:

Psalm 104:24 How great are thy works, O Lord ? thou hast made all things in wisdom: the earth is filled with thy riches.

Proverbs 30:3,4 I have not learned wisdom, and have not known the science of saints. . . .

Isaiah 40:28 Knowest thou not, or hast thou not heard? the Lord is the everlasting God, who hath created the ends of the earth: he shall not faint, nor labour, neither is there any searching out of his wisdom.

Romans 11:33 O the depth of the riches of the wisdom and of the knowledge of God! How incomprehensible are his judgments, and how unsearchable his ways!