"The greatest virtues are those which are most useful to other persons."

"To give money is an easy matter and in any man's power. But to decide to whom to give it, and how large and when, and for what purpose and how, is neither in everyman's power nor an easy matter."

"It is the mark of an educated mind to rest satisfied with the degree of precision which the nature of the subject admits and not to seek exactness where only an approximation is possible."

"A whole is that which has beginning, middle and end."

"The gods too are fond of a joke."

"They should rule who are able to rule best."

"In all things of nature there is something of the marvelous."

"A vacuum is a hell of a lot better than some of the stuff that nature replaces it with."

"Adapt or perish, now as ever, is nature's inexorable imperative."

"It's amazing how quickly nature consumes human places after we turn our backs on them. Life is a hungry thing."

"The refreshing pleasure from the first view of nature, after the pain of illness, and the confinement of a sick-chamber, is above the conceptions, as well as the descriptions, of those in health."

"Nature is just enough; but men and women must comprehend and accept her suggestions."