Of God and His Creatures2. The end of every human creature is to adhere to God, for in that his happiness consists.
4. That should be the main purpose of a law, from which the law derives its efficacy. But the law given by God has efficacy among men from the fact that man is suited to God. This therefore ought to be the chief precept in the divine law, that the human mind should adhere to God.
Hence it is said: And now, Israel, what doth the Lord thy God ask of thee but that thou fear the Lord thy God and walk in his ways, and love him and serve the Lord thy God with thy whole heart and thy whole soul? (Deut. x, 12.)
3.114 : That it was necessary for a Law to be given to Man by God
3.116 : That the End of the Divine Law is the Love of God