Proverbs 20:5

Deep water, is counsel in a man's heart, but, a man of understanding, will draw it out.

Psalm 64:6

They devise perverse things, They have completed the device well devised, Both the intent of each one, and the mind, are unsearchable.

Proverbs 18:4

Deep waters, are the words of a man's mouth, - a bubbling brook, the well-spring of wisdom.

1 Corinthians 2:11

For who of men knoweth the things of a man, - save the spirit of the man that is in him? thus, even the things of God, hath no one come to know, save 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, - a bubbling brook, the well-spring of wisdom.
Psalm 64:6
They devise perverse things, They have completed the device well devised, Both the intent of each one, and the mind, are unsearchable.
1 Corinthians 2:11
For who of men knoweth the things of a man, - save the spirit of the man that is in him? thus, even the things of God, hath no one come to know, save the Spirit of God.