Page:Early Greek philosophy by John Burnet, 3rd edition, 1920.djvu/260

246 of the body has pores into which the appropriate food will fit. Pleasure and pain were derived from the absence or presence of like elements, that is, of nourishment which would fit the pores. Tears and sweat arose from a disturbance which curdled the blood; they were, so to say, the whey of the blood.

118. For the theory of perception held by Empedokles we have the original words of Theophrastos: