To those searching for truth -- not the truth of dogma and darkness but the truth brought by reason, search, examination, and inquiry, discipline is required. For faith, as well intentioned as it may be, must be built on facts, not fiction -- faith in fiction is a damnable false hope.

I never view mistakes as failures. They are simply opportunities to find out what doesn't work.

Life's most soothing things are a child's goodnight and sweet music.

Before you reject an idea, find at least five good things about it.

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

The perils of overwork are slight compared with the dangers of inactivity.

There cannot be overproduction of anything which men and women want. And their wants are unlimited, except by the size of their stomachs.