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

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

I never did a day's work in my life. It was all fun.

The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.

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

There is no substitute for hard work.