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

His genius he was quite content in one brief sentence to define; Of inspiration one percent, of perspiration, ninety nine.

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

IF PARENTS PASS ENTHUSIASM ALONG TO THEIR CHILDREN, THEY WILL LEAVE THEM AN ESTATE OF INCALCULABLE VALUE

Be brave as your fathers before you. Have faith and go forward.

The first requisite of success is the ability to apply your physical and mental energies to one problem without growing weary.

Until man duplicates a blade of grass, nature can laugh at his so called scientific knowledge.