Carl Sagan

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright Brothers. But they also laughed at Bozo the Clown.

I think about fanaticism - oblivion awaits, especially for minor writers, so you have to be a fanatic; you have to be a crank to keep going, but on the other hand, what else would you do with the rest of your life? You gotta do something.