Remember that pain has this most excellent quality. If prolonged it cannot be severe, and if severe it cannot be prolonged.
Seneca the YoungerJust as so many rivers, so many showers of rain from above, so many medicinal springs do not alter the taste of the sea, so the pressure of adversity does not affect the mind of the brave man. For it maintains its balance, and over all that happens it throws its own complexion, because it is more powerful than external circumstances.
Seneca the Younger