Saikat Guha (1974–2008) wrote prolifically on many topics. Trained as a philosopher and physicist, Guha was interested in topics ranging from sexual ethics to Bell’s Theorem to Anselm’s ontological argument to Augustine’s persecution of the Donatists—though he was primarily a metaphysician. Guha studied at the University of Texas at Austin, Boise State University, the University of Washington at Seattle, and Syracuse University. He wrote more than one hundred papers from roughly 1997–2006, five of which are published here. Three of these papers reformulate some of Aquinas’s key doctrines on God: his first, second, and third ways, and his account of how necessity of being entails absolute perfection. The fourth paper considers whether Ockham’s razor requires the presumption of atheism. The fifth paper presents a logical model of the doctrine of the Trinity in order to prove that the doctrine can be understood without logical contradiction.