Life is complex in its expression, involving more than percipience, namely desire, emotion, will, and feeling.

Nature, even in the act of satisfying anticipation, often provides a surprise.

Civilizations can only be understood by those who are civilized.

I always feel that I have two duties to perform with a parting guest: one, to see that he doesn't forget anything that is his; the other, to see that he doesn't take anything that is mine.

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.

An open mind is all very well in its way, but it ought not to be so open that there is no keeping anything in or out of it.

Each human being is a more complex structure than any social system to which he belongs.