The great trouble is that the preachers get the children from six to seven years of age and then it is almost impossible to do anything with them.

I am both pleased but astonished by the fact that mankind has not yet begun to use all the means and devices that are available for destruction. I hope that such weapons are never manufactured in quantity.

Continued innovation is the best way to beat the competition.

There is no subsitute for hard work.

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

The doctor of the future will give no medication, but will interest his patients in the care of the human frame, diet and in the cause and prevention of disease. ~

Mr. Edison worked endlessly on a problem, using the method of elimination. If a person asked him if he were discouraged because so many attempts proved unavailing, he would say, "No, I am not discouraged, because every wrong attempt discarded is another step forward.".