Deuteronomy 10:13

to keep the commandments of the Lord and His statutes, both the precepts of the covenant and the obligations of the universal Moral Law, which I command thee this day for thy good? The true fear of the Lord, as it learns to understand the mercy of God, is ever the source of love toward Him, which, in turn, manifests itself in a wholehearted service that puts aside all selfish motives.