`I ca'n't believe that!' said Alice.
`Ca'n'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 ca'n't believe impossible things.'
`I daresay 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 believed as many as six impossible things before breakfast.
from Through the Looking Glass by Lewis Carroll