You can be invincible, if you enter into no contest in which it is not in your power to conquer.
EpictetusWherever I go it will be well with me, for it was well with me here, not on account of the place, but of my judgments which I shall carry away with me, for no one can deprive me of these; on the contrary, they alone are my property, and cannot be taken away, and to possess them suffices me wherever I am or whatever I do.
Epictetus