Anaïs Nin said this quote

The writer is the duelist who never fights at the stated hour, who gathers up an insult, like another curious object, a collector's item, spreads it out on his desk later, and then engages in a duel with it verbally. Some people call it weakness. I call it postponement. What is weakness in the man becomes a quality in the writer. For he preserves, collects what will explode later in his work. That is why the writer is the loneliest man in the world; because he lives, fights, dies, is reborn always alone; all his roles are played behind a curtain. In life he is an incongruous figure.