What is necessary is the knowledge of God, for it is the knowledge of God which gives the love for God. And it is the knowledge and the love of God which give a perfect belief in God. No one can have knowledge of God and have no love for God, but one can have a love for God and no knowledge of God. No one can have knowledge of God and love for God, and yet no belief in God; but it is possible to have a belief in God but no love for God.