loving Him. Consequently, the union with God is the most perfect human happiness and the ultimate goal of human life. But we cannot attain to this happiness by our own natural powers; it is a gift that must be given us by God, who strengthens us by the "light of glory" so that we can see Him as he is, without any intermediary. (Thomas quotes Psalm 36:9 on this point: "In your light we shall see light.") Further, since every created image or likeness of God (including even the most perfect "ideas" or "images" of God we might generate in our minds) is necessarily finite, it would thus be infinitely less than God himself. The only perfect and infinite good, therefore, is God Himself, which is why Aquinas argues that our perfect happiness and final end can only be the direct union with God Himself and not with any created image of Him. This union comes about by a kind of "seeing" perfectly the divine essence itself, a gift given to our intellects when God joins them directly to Himself without any intermediary. And since in seeing this perfect vision of what (and who) God is, we grasp also His perfect goodness, this act of "seeing" is at the same time a perfect act of loving God as the highest and infinite goodness. According to Aquinas, the beatific vision surpasses both faith and reason. Rational knowledge does not fully satisfy humankind's innate desire to know God, since reason is primarily concerned with sensible objects and thus can only infer its conclusions about God indirectly. The theological virtue of faith, too, is incomplete, since Aquinas states that it always implies some imperfection in the understanding. The believer does not wish to remain merely on the level of faith but to grasp directly the object of faith, who is God himself. Thus only the fullness of the beatific vision satisfies this fundamental desire of the human soul to know God. Quoting Paul, Aquinas notes "We see now in a glass darkly, but then face to face" (i Cor. 13:12). The beatific vision is the final reward for those saints elected by God to partake in and "enjoy the same happiness wherewith God is happy, seeing Him in the way which He sees Himself" in the next life. Roman Catechism According to the Roman Catechism, the saints in heaven see God, whereby they