Campe told them tales of history--of Achilles, Pericles and Caesar. Then they studied Greek, that they might read of Athens in the language of the men who made Athens great. They translated "Robinson Crusoe" into the German language, and Campe's translation of "Robinson Crusoe" is today a German classic. It was all natural--interesting, easy. The day was filled with work and play, and joyous tales of what had been said by others in days agone. "Teach only what you know, and never that which you merely believe," said Rousseau. There is still a cry that religion should be taught in the public schools. If we ask, "What religion?" the answer is, "Ours, of course!" Religious dogma, being a matter of belief, was taught to the Humboldts as a part of history. So these boys very early became acquainted with the dogmas of Confucianism, Mohammedanism, Christianity. They separated, compared and analyzed, and saw for themselves that dogmatic religions were all much alike. To know all religions is to escape slavery to any. In studying the development of races these boys saw that a certain type of religion fits a certain man in a certain stage of his evolution, and so perhaps to that degree religion is necessary. An ethnologist is never a Corner Grocery Infidel. The C.G.I. is very apt to be converted at the first revival, outrivaling all other "seekers," and when warm weather comes, falling from grace and dropping easily into scofferdom. The Humboldts, like Thoreau, never had any quarrel with God, and they were never tempted to go forward to the Mourners' Bench. Origin and destiny did not trouble them; predestination and justification by faith were not even in their curriculum; foreordination and baptism were to them problems not to be taken seriously. By studying religions in groups and incidentally, they learned to distinguish the fetish in each. They read Greek mythology side by side with Judean mythology and noted similarities. The intent of Tutor Campe was to give these boys a scientific education. Science is only classified commonsense. To be truly scientific is to know differences--to distinguish between this and that. Every successful farmer has traveled a long way into science, for science deals with the maintenance of life. To know soils, animals and vegetation is to be scientific.