"There should be little need of apologizing for a new translation into English of Saint Bonaventura's "Itinerarium Mentis ad Deum," for it has been recognized by all serious historians of philosophy as one of the shorter masterpieces of medieval philosophy. It sets forth in very few pages a whole system of metaphysics; it illustrates a philosophical method; it typifies the thinking of one of the great monastic orders of the West; it stands at the beginning of Renaissance science as one of those documents in which the future can be seen in germ. Besides its importance as an outstanding work in metaphysics, a work comparable to Descartes' "Discourse on Method", Leibniz's Monadology, or Hume's "Enquiry" in its compactness and suggestiveness, it represents a strain of medieval though which has been too much neglected since the publication of "Aeterni Patris", in 1879"--page 4 of cover.