Volume 3 / Book 4 — CHAPTER IX. WHETHER WHAT APPEARS TO OUR SENSES AND IMAGINATIONS BE TRUE OR NOT.

The Stoics say that what the senses represent is true; what the imagination, is partly false, partly true. Epicurus, that every impression which either the sense or fancy gives us is true, but of those things that fall under the account of opinion, some are true, some false: sense gives us a false representation of those things only which are the objects of our understanding; but the fancy gives us a double error, both of things sensible and things intellectual. Empedocles and Heraclides, that the senses perceive by a just accommodation of the pores in every case; every thing that is perceived by the sense being congruously adapted to its proper organ.