what
Proverbs 14:10
The heart knoweth his own bitterness; and a stranger doth not intermeddle with his joy.
Proverbs 20:5
Counsel in the heart of man is like deep water; but a man of understanding will draw it out.
Proverbs 20:27
The spirit of man is the candle of the LORD, searching all the inward parts of the belly.
Jeremiah 17:9
The heart is deceitful above all things, and desperately wicked: who can know it?
even
1 Corinthians 2:10
But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.
Romans 11:33
O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!
Romans 11:34
For who hath known the mind of the Lord? or who hath been his counsellor?