The night crept on apace, the moon went down, the stars grew pale and dim, and morning, cold as they, slowly approached. Then, from behind a distant hill, the noble sun rose up, driving the mists in phantom shapes before it, and clearing the earth of their ghostly forms till darkness came again.
What we see in history is not a transformation, a passing of one race into another, but entirely new and perfect creations, which the ever-youthful productivity of nature sends forth from the invisible realm of Hades.
You must not know too much or be too precise or scientific about birds and trees and flowers and watercraft; a certain free-margin , or even vagueness - ignorance, credulity - helps your enjoyment of these things.