Thomas A. Edison

The body is a community made up of its innumerable cells or inhabitants.

The body is a community made up of its innumerable cells or inhabitants.

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in read more

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in connection with the electric light ... Yet in only two cases did my experiments prove the truth of my theory.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

To have a great idea, have a lot of them.

To have a great idea, have a lot of them.

The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without read more

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