Ecclesiastes 8:17

and I saw all the work of God, I concluded that man cannot discover the work that is done under the sun. Even though man may labor in seeking, he will not discover; and [more than that], though a wise man thinks and claims he knows, he will not be able to find it out.

Ecclesiastes 3:11

He has made everything beautiful and appropriate in its time. He has also planted eternity [a sense of divine purpose] in the human heart [a mysterious longing which nothing under the sun can satisfy, except God]—yet man cannot find out (comprehend, grasp) what God has done (His overall plan) from the beginning to the end.

Psalm 73:16


When I considered how to understand this,
It was too great an effort for me and too painful

Romans 11:33

Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are His judgments and decisions and how unfathomable and untraceable are His ways!

Job 5:9


Who does great and unsearchable things,
Marvelous things without number.

Job 11:7-9


“Can you discover the depths of God?
Can you [by searching] discover the limits of the Almighty [ascend to His heights, extend to His widths, and comprehend His infinite perfection]?

Psalm 40:5


Many, O Lord my God, are the wonderful works which You have done,
And Your thoughts toward us;
There is none to compare with You.
If I would declare and speak of your wonders,
They would be too many to count.

Psalm 104:24


O Lord, how many and varied are Your works!
In wisdom You have made them all;
The earth is full of Your riches and Your creatures.

Proverbs 30:3-4


I have not learned [skillful and godly] wisdom,
Nor do I have knowledge of the Holy One [who is the source of wisdom].

Ecclesiastes 7:23-24

I have tested all this with wisdom. I said, “I will be wise [independently of God],” but true wisdom was far from me.

Ecclesiastes 11:5

Just as you do not know the way and path of the wind or how the bones are formed in the womb of a pregnant woman, even so you do not know the activity of God who makes all things.

Isaiah 40:28


Do you not know? Have you not heard?
The Everlasting God, the Lord, the Creator of the ends of the earth
Does not become tired or grow weary;
There is no searching of His understanding.

Treasury of Scripture Knowledge

Summary

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.

Bible References

That a man

Ecclesiastes 3:11
He has made everything beautiful and appropriate in its time. He has also planted eternity [a sense of divine purpose] in the human heart [a mysterious longing which nothing under the sun can satisfy, except God]—yet man cannot find out (comprehend, grasp) what God has done (His overall plan) from the beginning to the end.
Ecclesiastes 7:23
I have tested all this with wisdom. I said, “I will be wise [independently of God],” but true wisdom was far from me.
Ecclesiastes 11:5
Just as you do not know the way and path of the wind or how the bones are formed in the womb of a pregnant woman, even so you do not know the activity of God who makes all things.
Job 5:9

Who does great and unsearchable things,
Marvelous things without number.
Job 11:7

“Can you discover the depths of God?
Can you [by searching] discover the limits of the Almighty [ascend to His heights, extend to His widths, and comprehend His infinite perfection]?
Psalm 40:5

Many, O Lord my God, are the wonderful works which You have done,
And Your thoughts toward us;
There is none to compare with You.
If I would declare and speak of your wonders,
They would be too many to count.
Psalm 73:16

When I considered how to understand this,
It was too great an effort for me and too painful
Psalm 104:24

O Lord, how many and varied are Your works!
In wisdom You have made them all;
The earth is full of Your riches and Your creatures.
Proverbs 30:3

I have not learned [skillful and godly] wisdom,
Nor do I have knowledge of the Holy One [who is the source of wisdom].
Isaiah 40:28

Do you not know? Have you not heard?
The Everlasting God, the Lord, the Creator of the ends of the earth
Does not become tired or grow weary;
There is no searching of His understanding.
Romans 11:33
Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are His judgments and decisions and how unfathomable and untraceable are His ways!