In my own house I rigged up a laboratory and studied chemistry in the evenings, determined that there should be nothing in the manufacture of steel that I would not know. Although I had received no technical education I made myself master of chemistry and of the laboratory, which proved of lasting value.

The man who has done his best has done everything. The man who has done less than his best has done nothing.

If you must be a glutton, be a glutton for work.

The man who attracts attention is the man who is thinking all the time, and expressing himself in little ways. It is not the man who tries to dazzle his employer by doing the theatrical, the spectacular.

For my own part I am more interested in my work than its mere money value.

You can tell a workingman you like him, but he knows whether you are sincere or not. You can't make him believe you are interested in his welfare unless you are.

The thing that most people call 'genius' I do not believe in.