 Invoking celestial powers, occult virtues, the force of the imagination, and the intermediary actions of vapors and spirits, Pomponazzi contended that by using only Aristotelian natural principles it was possible to save or explain seemingly miraculous, prodigious, and preternatural phenomena. Pomponazzi accepted the veracity of many of these phenomena, trusting for the most part in the accounts of contemporaries and ancient histories (12.7). At times, however, he rejected accounts from history as implausible, such as tales of Vespasian curing with his saliva and his foot (8.1). Nevertheless, in his view, the numerous historical narratives of presages, oracles, and divination confirmed their reality (10.2). 