Thou, Lord, which knowest the hearts of all men. ([Acts 1 : 24].)
Thou knowest my down-sitting and mine up-rising; thou understandest my thought afar off. Thou compassest my path and my lying down, and art acquainted with all my ways. ([Ps. 139 : 2, 3].)
For he knoweth the secrets of the heart. ([Ps. 44 : 21].)
God Tries Men to Find Out what is in their Hearts.
The Lord, your God, proveth you, to know whether ye love the Lord your God, with all your heart and with all your soul. ([Deut. 13 : 3].)
The Lord thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thy heart. ([Deut. 8 : 2].)
For now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son, from me. ([Gen. 22 : 12].)
God is All-Powerful.
Behold, I am the Lord, the God of all flesh; is there anything too hard for me?... There is nothing too hard for thee. ([Jer. 32 : 27], [17].)