"There is nothing in which the birds differ more from man than the way in which they can build and yet leave a landscape as it was before."

"There are two sorts of curiosity - the momentary and the permanent. The momentary is concerned with the odd appearance on the surface of things. The permanent is attracted by the amazing and consecutive life that flows on beneath the surface of things."

"It is in games that many men discover their paradise."

"The belief in the possibility of a short decisive war appears to be one of the most ancient and dangerous of human illusions."