The term amor fati, the love of fate, comes from the more modern philosopher Nietzsche. The idea, however, runs throughout the Stoic philosophy. If you can accept the world as it is, you will not desire things that will never be. This is not meant to discourage you from striving for better; after all, how would you have the virtue Courage if that were the case? But if you can’t come to terms with what is happening before you, your happiness will always be interrupted.
