Never Say I Failed 99 Times, Say I Discovered 99 Ways Which Causes Failure!

Sticking to it is the genius.

A diamond is a piece of coal that stuck to the job

X-rays ... I am afraid of them. I stopped experimenting with them two years ago, when I came near to losing my eyesight and Dally, my assistant practically lost the use of both of his arms.

I never knew I had an inventive talent until Phrenology told me so. I was a stranger to myself until then!

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

The strength of the Constitution, lies in the will of the people to defend it.