Note 38 — Chapter I

'The knowledge that is suited to our situation and powers, the whole compass of moral, natural, and mathematical science, was neglected by the new Platonists; whilst they exhausted their strength in the verbal disputes of metaphysics, they attempted to explore the secrets of the invisible world, and studied to reconcile Aristotle with Plato on subjects of which both these philosophers were as ignorant as the rest of mankind. Consuming their reason in those deep but unsubstantial meditations, their minds were exposed to illusions of fancy. They flattered themselves that they possessed the secret of disengaging the soul from its corporeal prison; claimed a familiar intercourse with demons and spirits; and by a very singular revolution, converted the study of philosophy into that of magic.'—The Decline and Fall of the Roman Empire, chap. xiii.