As in everything, nature is the best instructor.

When people attempt to rebel against the iron logic of Nature, they come into conflict with the very same principles to which they owe their existence as human beings. Their actions against Nature must lead to their own downfall.

Nature knows no political frontiers. She begins by establishing life on this globe and then watches the free play of forces. Those who show the greatest courage and industry are the children nearest to her heart, and they will be granted the sovereign right of existence.

It's possible to satisfy the needs of the inner life by an intimate communion with nature, or by knowledge of the past.