4. The Threshold In Nature and In Man
We find thus in Greek times the heliocentric conception of the world; we find the very same picture as we have to-day of man's place in the planetary system and his relation to the heaven of the fixed stars. In olden times, however, this heliocentric conception of the world was a secret known only to a few, who had undergone a strict training of the will before such knowledge could be imparted to them.
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