"Our ideas must be as broad as Nature if they are to interpret Nature"

"The art of medicine consists in amusing the patient while nature cures the disease"

"Nature and wisdom never are at strife"

"We cannot command Nature except by obeying her"

"He loves nature in spite of what it did to him"

"Where is human nature so weak as in the bookstore?"

"The sound of the human voice is the best of nature but only if it comes out from the feelings"

"There are more men ennobled by study than by nature"

"He is richest who is content with the least, for content is the wealth of nature"

"Art is not merely an imitation of the reality of nature, but in truth a metaphysical supplement to the reality of nature, placed alongside thereof for its conquest"

"Though nature be ever so generous, yet can she not make a hero alone. Fortune must contribute her part too; and till both concur, the work cannot be perfected"