Nature encourages no looseness, pardons no errors.

A life in harmony with nature, the love of truth and virtue, will purge the eyes to understanding her text.

Nothing is rich but the inexhaustible wealth of nature. She shows us only surfaces, but she is a million fathoms deep.

Nature... She pardons no mistakes. Her yea is yea, and her nay, nay.

Nature is an endless combination and repetition of a very few laws. She hums the old well-known air through innumerable variations.

Everything in Nature contains all the powers of Nature. Everything is made of hidden stuff.