According to The Writer's Almanac today, Gloria Steinem said

"Writing is the only thing that, when I do it, I don't feel I should be doing something else."

How interesting; for me, the struggle is to overcome the feeling that I should always be doing something else than writing. Time writing feels like time stolen from "better things to do" and yet it's the only endeavor in which I don't feel that I'm poaching on someone else's territory.