Circumstances don't make the man, they only reveal him to himself.
— Epictetus
Discourses, Book 1
Adversity
3 quotes on adversity from the Stoic tradition.
A gem cannot be polished without friction, nor a man perfected without trials.
— Seneca
On Providence
Brave men rejoice in adversity, just as brave soldiers triumph in war.
— Seneca
On Providence, Chapter 4