9 The heart is deceitful above all things, and desperately wicked: who can know it?
10 I the Lord search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings.
Proverbs 3:5-6 KJV
5 Trust in the Lord with all thine heart; and lean not unto thine own understanding.
6 In all thy ways acknowledge him, and he shall direct thy paths.