"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving."

"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."

"It is the supreme art of the teacher to awaken joy in creative expression and knowledge."

"If I had only known, I would have been a locksmith."

"Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions."

"I never teach my pupils. I only attempt to provide the conditions in which they can learn."