“I dare say you haven’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 believe as many as six impossible things before breakfast.” "I'm sure (my memory) only works one way;" Alice remarked. "I can't remember things before they happen." "It's a poor sort of memory that only works backwards." the Queen remarked.
“There is no use trying,” said Alice: “one can’t believe in impossible things.”