The difference between sex and love is like the difference between an education without a philosophy of life and one with such an integrating factor. A system without a philosophy measures progress in terms of substitution. Spencer is substituted for Kant, Marx for Spencer, Freud for Marx. There is no continuity in mental development, any more than the automobile grew out of the horse and buggy. But in a Christian education, there is a deepening of a mystery. One starts with a simple truth that God exists. Instead of abandoning that idea when one begins to study science, one deepens his knowledge of God with a study of the Trinity and then begins to see the tremendous ramifications of Divine Power in the universe, of Divine Providence in history, and of Divine Mercy in the human heart.