Alice laughed. "There's no use trying," she said "one can't believe impossible things." "I daresay you havn't had much practice," said the Queen. "When I was your age, I always did it for half-an-hour a day. Why, sometimes I've believed as many as six impossible things before breakfast..."

The Complete Works of Lewis Carroll, Through the Looking-Glass, Chapter V (p. 200), The Modern Library. 1936