%0 Journal Article %T How can Being be Limited?: W. Norris Clarke on Thomas¡¯s ¡°Limitation of Act by Potency¡± %A Sarah Borden Sharkey %J The Saint Anselm Journal %D 2009 %I Institute for Saint Anselm Studies %X Fr. Norris Clarke's 1952 paper on Thomas Aquinas's limitation of act by potency continues to be one of his key interpretive papers on Thomas. It articulates Thomas's position on being as a synthesis of the Neoplatonic and Aristotelian traditions, and gives a strong reading of the centrality of the act of existence in Thomistic metaphysics. Central to the account is Clarke's commitment to a 'thin essence' view, where essence is understood simply as potencies limiting act. Precisely what it means, however, for potencies (that is, a particular kind of non-being) to do anything is less than fully clear. This paper attempts to clarify Clarke's position by comparing it with Stein's alternative understanding of essential being¡ªin contrast to Thomistic potencies¡ªas limiting actual being. %K Thomas Aquinas %K being %K existential Thomism %K metaphysics %K Neoplatonism %U http://www.anselm.edu/Documents/Institute%20for%20Saint%20Anselm%20Studies/7.1BordenSharkey.pdf