Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.

There is far more opportunity than there is ability.

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.

The doctor of the future will give no medicine, but will involve the patient in the proper use of food, fresh air and exercise

Good fortune is what happens when opportunity meets with planning.

The only time I really become discouraged is when I think of all the things I would like to do and the little time I have in which to do them.

I was always afraid of things that worked the first time. Long experience proved that there were great drawbacks found generally before they could be got commercial; but here was something there was no doubt of.