Nearly a half a century earlier Xenophanes, of Colophon, had ventilated ideas much more obnoxious to the priests. He had done for his age what Feuerbach did to the Nineteenth century--he had explained the origin of the gods by Anthropomorphism. Said he: “If oxen or lions had hands, and could paint with their hands and produce works of art as men do, horses would paint the forms of the gods like horses and oxen like oxen. Each would represent them with bodies according to the form of each. So the Ethiopians make their gods black and snubnosed; the Thracians give theirs red hair and blue eyes.” Had Xenophanes lived at Athens, where a religious revival had just taken place, he would have shared the fate which later overtook the impious Socrates. Luckily for Xenophanes, in the colony where he lived “the gods were left to take care of themselves.” Anaxagoras was the first to determine what causes the eclipses and the illumination of the moon:--“The moon has not a light of her own but gets it from the sun. The moon is eclipsed by the earth screening the sun’s light from it. The sun is eclipsed at the new moon, when the moon screens it from us.” The Pythagoreans who must be distinguished from the medicine man Pythagoras, from whom they only take their name indirectly, and not as disciples, believed the reality of the universe was to be found in numbers. They were deceived into this absurdity by the exactness of mathematical conclusions. This was excusable among the Greeks to whom arithmetical combinations were as wonderful as electrical phenomena are to us, but its revival in our day by astrologers and theosophists has no such justification. Socrates, born about 470 B. C., at Athens, is described as “pug-nosed, thick-lipped, big-bellied and bulging-eyed”--the very opposite of the Greek ideal of beauty. He believed that knowledge itself would bring virtue, and sought to discover the true ground of knowledge. His search brought him into conflict with the religious bigotry of his day and he was finally sentenced to death and died from drinking hemlock in 399 B. C. He wrote nothing and his work is preserved mainly through his influence on Plato. Leukippos and Demokritos are linked together through their statements of the atomic theory, made more than twenty centuries before Dalton. They placed the permanent reality of things in numberless atoms, of which Leukippos said “there are an infinite number of them, and they are invisible owing to the smallness of their bulk.” Plato we shall pass by; his metaphysical doctrine of ideas contributed little of value to the solution of the riddle of the universe.