A failure teaches you that something can't be done-that way.

What is a college? An institute of learning. What is a business? An institute of learning. Life, itself, is an institute of learning.

I am proud of the fact that I never invented weapons to kill.

There seems to be no limit to which some men will go to avoid the labor of thinking. Thinking is hard work.

The greatest discoveries will be along spiritual lines. This is the field where miracles are going to happen. Spiritual power is the greatest underdeveloped power and has the greatest future.

My success is due more to my ability to work continuously on one thing without stopping than to any other single quality.

When you have exhausted all possibilities, remember this - you haven't.