Proverbs 20:5

Counsel in the heart of man is deep water, and a man of understanding draweth it out.

Psalm 64:6

They devise iniquities: We have it ready, the plan is diligently sought out. And each one's inward thought and heart is deep.

Proverbs 18:4

The words of a man's mouth are deep waters, and the fountain of wisdom is a gushing brook.

1 Corinthians 2:11

For who of men hath known the things of a man except the spirit of the man which is in him? thus also the things of God knows no one 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 deep waters, and the fountain of wisdom is a gushing brook.
Psalm 64:6
They devise iniquities: We have it ready, the plan is diligently sought out. And each one's inward thought and heart is deep.
1 Corinthians 2:11
For who of men hath known the things of a man except the spirit of the man which is in him? thus also the things of God knows no one except the Spirit of God.