There is no substitute for hard work.

I am proud of the fact that I never invented weapons to kill.

There seems to be no limit to which some men will go to avoid the labor of thinking. Thinking is hard work.

My mother was the making of me.

I am quite correctly described as 'more of a sponge than an inventor....'

Your worth consists in what you are and not in what you have.

The First 40 hours of work per week are for survival. Everything after that is for success.