The naturalistic interpretation of supernatural phenomena that Pietro Pomponazzi – called by Vanini "magister meus, divinus praeceptor meus, nostri seculi Philosophorum princeps" – had given in the early 16th century in his treatise "De Incantationibus" was summarised in "De Admirandis Naturae", where, in simple and elegant prose, Vanini also referred to Cardano, Julius Caesar Scaliger and other 16th century thinkers.