I owe my success to the fact that I never had a clock in my workroom. Seventy-five of us worked twenty hours every day and slept only four hours - and thrived on it.

I never pick up an item without thinking of how I might improve it.

There is always a better way.

There is a better way for everything. Find it.

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

Interest is the invention of Satan.

To me, the idea and expectation that the day is slowly and surely coming when we will be able to honestly say we are our brother's keeper and not his oppressor is very beautiful .