" There are always a dozen reasons for doing nothing,” Ann liked to say—it was a favourite apologia, indeed, for many of her misdemeanours—“There is only one reason for doing something. And that’s because you want to.” Or have to? Ann would furiously deny it: coercion, she would say, is just another word for doing what you want; or for not doing what you are afraid of. "

― John le Carré , John Le Carré: Three Complete Novels [Tinker, Tailor, Soldier, Spy / The Honourable Schoolboy / Smiley's People]