To my mom, who was always yelling at us to either stay in or stay out!
Infallible Logic
A little boy, caught in mischief, was asked by his mother: "How do you expect to get to Heaven?" He thought a minute, and then said: "Well, I'll just run in and out and in and out and keep slamming the door till they say: 'For heaven's sake come in or stay out.' Then I'll go in."