Proverbs 20:5

Wisdom in the heart of man is like deep water, but a man of understanding will draw it out.

Psalm 64:6

They search out injustice, saying, We have finished hiding a hidden plot. Yea, the inward part of man and the heart are deep.

Proverbs 18:4

The words of a man's mouth are like deep waters; the fountain of wisdom is like a flowing stream.

1 Corinthians 2:11

For who among men knows the things of a man except the spirit of man within him? So also no one knows the things of God except the Spirit of God.

Treasury of Scripture Knowledge

Summary

Counsel in the heart of man is like deep water; but a man of understanding will draw it out.

Bible References

General references

Proverbs 18:4
The words of a man's mouth are like deep waters; the fountain of wisdom is like a flowing stream.
Psalm 64:6
They search out injustice, saying, We have finished hiding a hidden plot. Yea, the inward part of man and the heart are deep.
1 Corinthians 2:11
For who among men knows the things of a man except the spirit of man within him? So also no one knows the things of God except the Spirit of God.