With regard to the gods Protagoras was naturally agnostic. He began his “Treatise on the Gods” with the words: “So far as the gods are concerned, I cannot know whether they exist or do not exist; or what their nature is. Many things prevent our knowing. The matter is obscure and life is short.”[162] One may be curious to know what large matter Protagoras found for his discussion when he began with this frank confession of ignorance; but it should be observed that in this confession there is nothing necessarily antagonistic to the popular theology of his day. It only shows what the words plainly declare, that a belief in the gods cannot depend upon knowledge. Another Sophist, Prodicus, maintained that the divinities were nothing but the kindly powers of nature which man had deified;[163] and the “Gentle Critias,” one of the worst of the Thirty Tyrants, and a ready pupil of the earlier Sophists, is said to have set forth in a satyric drama the theory that the gods were the clever invention of someone who wished to scare men out of their desire to do evil.[164] The effect of such scepticism and agnosticism we can easily imagine. Many things had been wrongly laid at the door of the Sophists, but it is small wonder that the conservative Athenian citizens came to look with distrust and alarm on these new-fangled subversive notions; that they banished Protagoras and burned his books in the market place; or finally that they should have put Socrates to death. Into this age of intellectual ferment and readjustment, of scepticism and eager inquiry, the age of Anaxagoras and the Sophists, Socrates entered. He was at once the child of his time and the greatest fecundator of men’s minds that Europe had yet known. He was born in 469 B.C. and was forced to drink the hemlock in March, 399, so that he had completed the allotted span of life. The son of a sculptor, we are told that he followed his father’s profession in his youth, but apparently he did not continue this long. Whence he derived the means of livelihood we do not know. He received the regular Athenian education, was interested especially in geometry and astronomy; the works of the philosophers he had read, but professed that he gained little from them. One is tempted to dwell on the picturesque characteristics of this man—his refusal to teach for pay, as did the ordinary teachers, his profession of complete ignorance—his only claim to wisdom, he said himself,—his ugliness of feature, and his beauty of soul, his omnivorous interest in the work of the humble craftsmen, above all on his belief that he had a warning spirit, a daemon, which checked him when his course was wrong. Although in obedience to this inward monitor Socrates refrained from politics, he fulfilled all his civic duties in peace and in war. He conformed to the traditional religion, sacrificing and praying to the traditional gods, although he undoubtedly did not hold that they were the limited and sensual