Balance. It was all about balance. That had been one of the first things that she had learned: the centre of the seesaw has neither up nor down, but upness and downness flow through it while it remains unmoved. You had to be the centre of the seesaw so the pain flowed through you, not into you. It was very hard. But she could do it!
Terry PratchettNo one knew where you were before you were born, but when you were born, it wasn't long before you found you'd arrived with your return ticket already punched.
Terry Pratchett