"It turns out that helping is the main thing. If you feel that you have a use, if you think your writing furthers life or truth in some way, then you keep writing. But if that feeling stops, you have to find something else to do. Or die, I guess. Or mow the lawn, or go somewhere and do something, like visit a historic house, or clean up a room, or teach people something that you think is worth knowing."
From 'The Anthologist' by Nicholson Baker.