Harlan Ellison said this quote

It is not merely enough to love literature if one wishes to spend one's life as a writer. It is a dangerous undertaking on the most primitive level. For, it seems to me, the act of writing with serious intent involves enormous personal risk. It entails the ongoing courage for self-discovery. It means one will walk forever on the tightrope, with each new step presenting the possiblity of learning a truth about oneself that is too terrible to bear.