(See also )

We are like tea bags, we don't know our own strength until we're in hot water.
Sis. Busche

What lies behind us, and what lies before us, are tiny matters compared to what lies within us.
unknown

The task ahead of us is never as great as the power behind us.
unknown

... the truly strong show their strength by being gentle.
Robert L. Backman

Faced with crisis, the man of character falls back on himself.
Charles de Gaulle