From Alice's Adventures in Wonderland, and Through the Looking Glass, by Lewis Carroll
"... Let's consider your age to begin with---how old are you?" "I'm seven and a half, exactly." "You needn't say `exactually,'" the Queen remarked. "I can believe it without that. Now I'll give _you_ something to believe. I'm just one hundred and one, five months and a day." "I can't believe _that_!" said Alice. "Can't you?" the Queen said in a pitying tone. "Try again: draw a long breath, and shut your eyes." Alice laughed. "There's no use trying," she said: "one _can't_ believe impossible things." "I daresay you haven't had much practice," said the Queen. "When I was you age, I always did it for half-an-hour a day. Why, sometimes I've believed as many as six impossible things before breakfast." -- Through the Looking-Glass Chapter v