What They Share
Both embrace fate and affirm life as it is
The Stoic amor fati and Nietzsche's own amor fati overlap significantly. Both teach that you should embrace everything that happens rather than wishing it were otherwise.
Both see suffering as essential for growth
The Stoics used hardship to build character; Nietzsche saw it as the forge of greatness. Both reject the idea that a comfortable life is a good life.
Both demand personal strength and self-mastery
Stoics master their emotions through reason; Nietzsche masters himself through self-overcoming. Both philosophies are deeply demanding.