The two partners in a law firm were having lunch when suddenly one of them jumped up from the table and said, "I have to go back to the office. I forgot to lock the safe!" "What are you worried about?" the other said. "We're both here."
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.