(E)very finite perfection we love and seek in the creation is to be found in an infinitely perfect form in God. What are we seeking in human love, in nature, in creativity, in thought? It’s desirable only because it’s a little like God. All that we love in creatures is a reflection of the Creator. There, and there alone, in Him, can we find everything we are seeking in them. The reflections of His perfections in the mirror of creation should send us away from the mirror, not into it. And when we run into the mirror, seeking our happiness there, the mirror breaks and our happiness shatters. For every truth is a reflection of His truth, every good is a reflection of His good, every beauty is a reflection of His beauty. The reflections are real, but they are only real reflections. They point back to the Reality they reflect. All truth is God’s truth. All goodness is God’s goodness. All beauty is God’s beauty. He must contain in Himself the whole perfection of being. And therefore He is what we need, He is all of what we need, and He is the only One we need. For if we need something else besides God, something in addition to God, then God is not God. There is a mystery about our desires: they have no limit! We are never totally and absolutely satisfied. Why? Because they are about God.
Peter Kreeft. Practical Theology. Spiritual Direction from St. Thomas Aquinas. Ignatius Press: San Francisco, 2014. (8. Abschnitt)