Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.

The real measure of success is the number of experiments that can be crowded into 24 hours.

We are striking it big in the electric light, better than my vivid imagination first conceived. Where this thing is going to stop Lord only knows.

I have better use for my brain than to poison it with alcohol. To put alcohol in the human brain is like putting sand in the bearings of an engine.

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

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

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