Bearing the cost

I wish she would grow up. She wasted all her school time wanting to be the age she is now, and she'll waste all the rest of her life trying to stay that age. Her whole idea is to race on to the silliest time of one's life as quick as she can and then stop there as long as she can. - Lewis, "The Last Battle" - about Susan and how silly she is being, saying that Narnia is for children