Job 11:8

He is higher than heaven; what wilt thou do? Deeper than hell; how wilt thou then know him?

Job 22:12

Now because that God is higher than the heavens, and because thou seest the stars are so high,

Job 26:6

yea, and all they which dwell beneath in the hell are not hid from him, and the very destruction itself cannot be kept out of his sight.

Job 35:5

Look unto the heaven, and behold it: consider the clouds, how they are higher than thou.

2 Chronicles 6:18

Howbeit, in very deed, can God dwell with man on earth? Behold, neither heaven or heaven above all heavens is able to contain thee! How should the house then which I have built for thee do it?

Psalm 103:11

For look how high the heaven is in comparison of the earth; so great is his mercy also toward them that fear him.

Psalm 139:6-8

Such knowledge is too wonderful and excellent for me; I cannot attain unto it.

Psalm 148:13

praise the name of the LORD! For his name only is excellent, and his praise above heaven and earth.

Proverbs 25:2-3

It is the honour of God to keep a thing secret; but the king's honour is to search out a thing.

Isaiah 55:9

But as far as the heavens are higher than the earth, so far do my ways exceed yours, and my thoughts yours.

Amos 9:2

Though they were buried in the hell, my hand shall fetch them from thence. Though they climb up to heaven, yet shall I cast them down.

Ephesians 3:18-19

might be able to comprehend with all saints, what is that breadth and length, depth and height:

Treasury of Scripture Knowledge

Summary

It is as high as heaven; what canst thou do? deeper than hell; what canst thou know?

Bible References

It is as high as heaven

Job 22:12
Now because that God is higher than the heavens, and because thou seest the stars are so high,
Job 35:5
Look unto the heaven, and behold it: consider the clouds, how they are higher than thou.
2 Chronicles 6:18
Howbeit, in very deed, can God dwell with man on earth? Behold, neither heaven or heaven above all heavens is able to contain thee! How should the house then which I have built for thee do it?
Psalm 103:11
For look how high the heaven is in comparison of the earth; so great is his mercy also toward them that fear him.
Psalm 148:13
praise the name of the LORD! For his name only is excellent, and his praise above heaven and earth.
Proverbs 25:2
It is the honour of God to keep a thing secret; but the king's honour is to search out a thing.
Isaiah 55:9
But as far as the heavens are higher than the earth, so far do my ways exceed yours, and my thoughts yours.

Deeper

Job 26:6
yea, and all they which dwell beneath in the hell are not hid from him, and the very destruction itself cannot be kept out of his sight.
Psalm 139:6
Such knowledge is too wonderful and excellent for me; I cannot attain unto it.
Amos 9:2
Though they were buried in the hell, my hand shall fetch them from thence. Though they climb up to heaven, yet shall I cast them down.
Ephesians 3:18
might be able to comprehend with all saints, what is that breadth and length, depth and height:

General references

Ecclesiastes 7:24
yea, and so deep that I might not reach unto her.
1 Corinthians 13:9
For our knowledge is unperfect, and our prophesying is unperfect: