The Lord weighs the hearts. 

The Lord knows the way of the righteous, but the way of the ungodly shall perish. § The Lord will show who is His and who is holy. § Your Father who sees in secret will Himself reward you openly.Search me, O God, and know my heart; try me, and know my anxieties; and see if there is any wicked way in me, and lead me in the way everlasting. § There is no fear in love; but perfect love casts out fear.Lord, all my desire is before You; and my sighing is not hidden from You. § When my spirit was overwhelmed within me, then You knew my path. § He who searches the hearts knows what the mind of the Spirit is, because He makes intercession for the saints according to the will of God.The solid foundation of God stands, having this seal: “The Lord knows those who are His,” and, “Let everyone who names the name of Christ depart from iniquity.”