Proverbs 20:5

Counsel in the heart of a man is deep water, And a man of understanding draweth it up.

Psalm 64:6

They search out perverse things, 'We perfected a searching search,' And the inward part of man, and the heart are deep.

Proverbs 18:4

Deep waters are the words of a man's mouth, The fountain of wisdom is a flowing brook.

1 Corinthians 2:11

for who of men hath known the things of the man, except the spirit of the man that is in him? so also the things of God no one hath known, 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
Deep waters are the words of a man's mouth, The fountain of wisdom is a flowing brook.
Psalm 64:6
They search out perverse things, 'We perfected a searching search,' And the inward part of man, and the heart are deep.
1 Corinthians 2:11
for who of men hath known the things of the man, except the spirit of the man that is in him? so also the things of God no one hath known, except the Spirit of God.