Every rational creature has all nature for his dowry and estate. It is his, if he will. He may divest himself of it; he may creepinto a corner, and abdicate his kingdom, as most men do, but he is entitled to the world by his constitution.
So Nature deals with us, and takes away Our playthings one by one, and by the hand Leads us to rest so gently, that we go, Scarce knowing if we wish to go or stay, Being too full of sleep to understand How far the unknown transcends the what we know.
Men go forth to marvel at the height of mountains, and the huge waves of the sea, the broad flow of the rivers, the vastness of the ocean, the orbits of the stars, and yet they neglect to marvel at themselves. Variant: Men go abroad to admire the heights of mountains, the mighty billows of the sea, the broad tides of rivers, the compass of the ocean, and the circuits of the stars, and pass themselves by.
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.
The wheels and springs of man are all set to the hypothesis of the permanence of nature. We are not built like a ship to be tossed, but like a house to stand.
The only thing that one really knows about human nature is that it changes. Change is the one quality we can predicate of it. The systems that fail are those that rely on the permanency of human nature, and not on its growth and development. The error of Louis XIV was that he thought human nature would always be the same. The result of his error was the French Revolution. It was an admirable result.