A Treatise On God As First Principle

In the first, what is eminent is said to be prior whereas what is exceeded in perfection is posterior. Put briefly, whatever in essence is more perfect and noble would be prior in this manner. It was this kind of priority Aristotle had in mind in his proof that act is prior to potency in the ninth book of the Metaphysics where he calls act prior according to substance and form (species). "The things that are posterior in becoming," he declares, "are prior in form and in substantiality."

Seeking what he describes as "the utmost limit of the knowledge our natural reason can achieve . . . concerning the True Existence [that is God]," John Duns Scotus (1265–1308) offers in this treatise one of philosophy’s most rigorous and ambitious attempts to deduce God’s existence from purely metaphysical theorems. As elucidated by its concise philosophical commentary, Thomas M. Ward's new translation of the Treatise on the First Principle puts a masterpiece of natural theology within reach of a new generation of English-reading students of philosophy.