Kites rise highest against the wind, not with it.
Chartwell
That which does not kill us makes us stronger.
Difficulties strengthen the mind, as labor does the body.
It is difficulties that show what men are.
We make a living by what we get, but we make a life by what we give.
Success is not final, failure is not fatal: it is the courage to continue that counts.
The pessimist sees difficulty in every opportunity. The optimist sees opportunity in every difficulty.