Difficulties strengthen the mind, as labor does the body.

So it is more useful to watch a man in time of peril, and in adversity to discern what kind of man he is; for then at last words of truth are drawn from the depths of his heart, and the mask it torn off, reality remains.

When you are joyous, look deep into your heart and you shall find it is only that which has given you sorrow that is giving you joy.