5 Counsel in the heart of man is as deep water; and the man of discernment bails.
Proverbs 20:5 Cross References - ECB
Psalms 64:6
6 They search for wickednesses; in searching, they consummate a search: both the inward man and the heart is deep.
Proverbs 18:4
4 The words of the mouth of a man are as deep waters, and the fountain of wisdom as a gushing wadi.
1 Corinthians 2:11
11 For what human knows those of a human, except the spirit of humanity within him? Even thus, those of Elohim, no one knows, except the Spirit of Elohim.