The thing that most people call 'genius' I do not believe in.
The man who has done his best has done everything. The man who has done less than his best has done nothing.
There is not a man in power at our Bethlehem steel works today who did not begin at the bottom and work his way up.
Nothing is more fatal to success than taking one's job as a matter of course.
There's no limit possible to the expansion of each one of us.
I am sure that few successful men are so-called 'natural geniuses.'