A man phones a mental hospital and asks the receptionist if there is anybody in Room 27 She goes and checks, and comes back to the phone, telling him that the room is empty "Good," says the man. "That means I must have really escaped."
Teacher : Which is more important to us, the sun or the moon? Pupil: Moon... Teacher : Why? Pupil : The moon gives us light at night when we need it but the sun gives us light only in the day time when we don't need it.
