These people have learned not from books, but in the fields, in the wood, on the river bank. Their teachers have been the birds themselves, when they sang to them, the sun when it left a glow of crimson behind it at setting, the very trees, and wild herbs.
Not only after two or three centuries, but in a million years, life will still be as it was; life does not change, it remains for ever, following its own laws which do not concern us, or which, at any rate, you will never find out. Migrant birds, cranes for example, fly and fly, and whatever thoughts, high or low, enter their heads, they will still fly and not know why or where. They fly and will continue to fly, whatever philosophers come to life among them; they may philosophize as much as they like, only they will fly.
There should be more sincerity and heart in human relations, more silence and simplicity in our interactions. Be rude when you're angry, laugh when something is funny, and answer when you're asked.