Real difficulties can be overcome; it is only the imaginary ones that are unconquerable.
—Theodore Newton Vail
Wondering Whom to Read Next?
- D. Wayne Calloway American Business Executive
- Cardinal Richelieu French Cardinal, Statemesan
- John La Farge American Artist, Writer
- Carl Anton Ewald German Gastroenterologist
- Wilhelm Roentgen German Physicist
- Elihu Root American Statesman
- Mary Kay Ash American Entrepreneur
- Bruce D. Henderson American Business Consultant
- Frederick W. Smith American Entrepreneur
- George Lucas American Filmmaker
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