Purpose in the heart of man is deep water, but a man of understanding will draw it out.
The words of a man's mouth are deep waters. The wellspring of wisdom is a flowing brook.
For what man knows the things of the man, except the spirit of the man in him? And so nobody knows the things of God except the Spirit of God.
They search out iniquities, [saying,] We have accomplished a diligent search. And the inward part of man and the heart [are] deep.
The sluggard will not plow because of the winter. Therefore he shall beg in harvest, and have nothing.
Most men will proclaim every one his own goodness, but a faithful man who can find?