You don't develop courage by being happy in your relationships everyday. You develop it by surviving difficult times and challenging adversity.
EpicurusPleasure is our first and kindred good. It is the starting point of every choice and of every aversion, and to it we always come back, inasmuch as we make feeling the rule by which to judge of every good thing.
EpicurusThe mind that is much elevated and insolent with prosperity, and cast down with adversity, is generally abject and base.
Epicurus