The happiness even of the naturalist depends in some measure upon his ignorance, which still leaves him new worlds of this kind to conquer. He may have reached the very Z of knowledge in the books, but he still feels half ignorant until he has confirmed each bright particular with his eyes.

The art of writing history is the art of emphasizing the significant facts at the expense of the insignificant. And it is the same in every field of knowledge. Knowledge is power only if a man knows what facts not to bother about.

A cat is only technically an animal, being divine.

In order to see birds it is necessary to become a part of the silence.

The days on which one has been the most inquisitive are among the days on which one has been happiest.

It may be that all games are silly. But then, so are humans.

The lovers of beauty must unite in a league, and carry out some great propagandist work through the country. They must demand the extermination of the bulldog and the dismantling of the cheap villa, both of which are responsible for a deal of our contentment amid ugliness.