Plutarch, De Iside et Osiride
Goodwin, Ed.

But I fear this would be to stir things that are not to be stirred, and to declare war not only (as Simonides speaks) against length of time, but also against many nations and families of mankind, whom a religious reverence towards these Gods holds fast bound like men astonished and amazed. And this would be no other than going about to remove so great and venerable names from heaven to earth, thereby shaking and dissolving that worship and persuasion that hath entered into almost all men's constitutions from their very birth, and opening vast doors to the Atheists' faction, who convert all divine matters into human, giving also a large license to the impostures of Euhemerus the Messenian, who out of his own brain contrived certain memoirs of a most incredible and imaginary mythology, and thereby spread all manner of Atheism throughout the world. This he did by describing all the received Gods under the style of generals, sea-captains, and kings, whom he makes to have lived in the more remote and ancient times, and to be recorded in golden characters in a certain [p. 85] country called Panchon, with which notwithstanding never any man, either Barbarian or Grecian, had the good fortune to meet, except Euhemerus alone, who (it seems) sailed to the land of the Panchoans and Triphyllians, that neither have nor ever had a being.