Why (do) we do it

For days and weeks on end one racks one's brains to no avail, and, if asked, one could not say whether one goes on writing purely out of habit, or a craving for admiration, or because one knows not how to do anything other, or out of sheer wonderment, despair or outrage, any more than one could say whether writing renders one more perceptive or more insane. Perhaps we all lose our sense of reality to the precise degree to which we are engrossed in our own work...

- WG Sebald, The Rings of Saturn