“The greatest discovery of my generation is that a human being can alter his life by altering his attitudes
“No man, however strong, can serve ten years as schoolmaster, priest, or senator, and remain fit for anything else
“Men may change their climate, but they cannot change their nature. A man that goes out a fool cannot ride or sail himself into common sense
“Worldly fame is but a breath of wind that blows now this way, and now that, and changes name as it changes direction
“It is well for people who think to change their minds occasionally in order to keep them clean. For those who do not think, it is best to at least rearrange their prejudices once in a while