I am afraid of radium and polonium ... I don't want to monkey with them.

I never did anything worth doing entirely by accident. . . Almost none of my inventions came about totally by accident. They were achieved by having trained myself to endure and tolerate hard work.

It is remarkable to what lengths people will go to avoid thought.

I do not believe any type of religion should ever be introduced into the public schools of the United States.

I know this world is ruled by Infinite Intelligence. It required Infinite Intelligence to create it and it requires Infinite Intelligence to keep it on its course ... It is mathematical in its precision.

It is astonishing what an effort it seems to be for many people to put their brains definitely and systematically to work.

The First 40 hours of work per week are for survival. Everything after that is for success.