"I wish I could manage to be glad!" the Queen said. "Only I never can remember the rule.
You must be very happy, living in this wood, and being glad whenever you like!"
"Only it is so very lonely here!" Alice said in a melancholy voice; and, at the thought of her loneliness, two large tears came rolling down her cheeks.
"Oh, don't go on like that!" cried the poor Queen, wringing her hands in despair. "Consider what a great girl you are. Consider what a long way you've come to-day. Consider what o-clock it is. Consider anything, but don't cry!"
Alice could not help laughing at this, even in the midst of her tears.
"Can you keep from crying by considering things?" she asked.
"That's the way it's done," the Queen said with a great decision: "nobody can do two things at once, you know. 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 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 practise," 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."(from: Through the Looking-Glass and what Alice found there, Lewis Carroll)