Practicing the Impossible

This is in magnet-form on my refrigerator. I see it numerous times every day, but haven’t stopped to read it for a while. I need to do so more:

“There is no use trying,” said Alice; “one can’t believe impossible things.” “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 believed as many as six impossible things before breakfast.” (Lewis Carroll)