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.

Books will soon be obsolete in the schools... Our school system will be completely changed in the next ten years.

First be sure a thing is wanted or needed, then go ahead.

Fools call wise men fools. A wise man never calls any man a fool.

My mind is incapable of conceiving such a thing as a soul. I may be in error, and man may have a soul; but I simply do not believe it.

I have not failed 10,000 times. I have succeeded in proving that those 10,000 ways will not work.

Show me a completely contented person and I'll show you a failure.