Genius is one percent inspiration and ninety-nine percent perspiration. As a result, a genius is often a talented person who has simply done all of his homework.

Nobody knows whether our personalities pass on to another existence or sphere, but if we can evolve an instrument so delicate to be manipulated by our personality as it survives in the next life such an instrument ought to record something.

Opportunity is missed by most people because it is dressed in overalls and looks like work.

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

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.

Sleep is like a drug. Take too much at a time and it makes you dopey. You lose time and opportunities.

I believe that the science of chemistry alone almost proves the existence of an intelligent creator.