“Children use the fist until they are of the age to use the brain”

“I don't wait for moods. You accomplish nothing if you do that. Your mind must know it has got to get down to work”

“Better to be without logic than without feeling”

“Any mind that is capable of real sorrow is capable of good”

“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”

“The hours of folly are measured by the clock, but of wisdom no clock can measure.”