By Fr. James V. Schall, S.J, The Catholic Thing - At least four famous, not-often-enough-repeated Aristotelian questions can be asked of any given thing when we try to figure out what and why it is. They are: 1) “What is it?” – a tree, a rabbit, a planet? 2) “Is it?” That is, does it exist rather than not exist? Does it stand outside of nothingness? 3) Who or what put it into motion or into being? 4) “Why is it in existence?” What is the reason for which it now exists?.. Of human beings, we can add a further question: “Who are you?”