The endeavor to change universal power by selfish supplication I do not believe in.

There is much more opportunity than there are people to see it.

The first requisite of success is the ability to apply your physical and mental energies to one problem without growing weary.

Results? Why, man, I have gotten lots of results! If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is often a step forward.

A good idea is never lost. Even though its originator or possessor may die, it will someday be reborn in the mind of another.

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.

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