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The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.
The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.
Thomas Alva Edison was an American inventor and businessman. He developed many devices in fields such as electric power generation, sound recording, and motion pictures. These inventions, which includ...
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