Abstract

The notion of spirit was a central notion of two ancient traditions: the medical and the philosophical tradition of ancient Greece and the neoplatonic philosophical one. In this paper we will examine the way in which a Byzantine philosopher of the 6th century, John Philoponus, handled this notion from a neoplatonic point of view, and how he assimilated the Aristotelian, the medical and the neoplatonic “πνεῦμα” theory in a single conception. Philoponus’ career can be divided into two periods: the one during which he was studying under Ammonius and the one during which he was writing in his own name, expressing his Christian convictions as a Byzantine philosopher, and criticizing neoplatonic doctrines opposed to the Christian dogma. We shall, thus, also present the refutation he gives to the neoplatonic theory of “πνεῦμα”, during the second period of his career.