He knows not his own strength who hath not met adversity. – William Samuel Johnson

This is just what I have thought when I have seen slaves at work – they seem to go through the motions of labor without putting strength into them. They keep their powers in reserve for their own use at night, perhaps. – Frederick Law Olmsted

There are two ways of exerting ones strength: one is pushing down, the other is pulling up. – Booker T. Washington

The five separate fingers are five independent units. Close them and the fist multiplies strength. This is organization. – James Cash Penney