Proverbs 20:5

Wise counsel in the heart of man is like a water in the deep of the earth; but he that hath understanding bringeth it forth.

Psalm 64:6

They imagine wickedness, and keep it secret among themselves; every man in the deep of his heart.

Proverbs 18:4

The words of a man's mouth are like deep waters; and the well of wisdom is like a full stream.

1 Corinthians 2:11

For what man knoweth the things of a man: save the spirit of a man which is within him? Even so the things of God knoweth no man, but 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; and the well of wisdom is like a full stream.
Psalm 64:6
They imagine wickedness, and keep it secret among themselves; every man in the deep of his heart.
1 Corinthians 2:11
For what man knoweth the things of a man: save the spirit of a man which is within him? Even so the things of God knoweth no man, but the spirit of God.