To scale up to the skies is impossible, he said.

To scale up to the skies is impossible, he said. "Well I said, "what other alternative have you beyond admitting that it was a heavenly teacher who taught this science?" If I say so; said he, that no teacher taught this science, I am absurd; and if I say it was an earthly teacher, it would be an equally irrational statement, for no human being ever by himself acquired knowledge of heaven above, or of hell beneath; for no human being has the power to pry into those things beyond the range of his eye's observation.

Even granting closeness of observation no inward knowledge can be gained, for according to my belief nothing is real except what is known through…