The first ghosts trembled with hope, and their excitement passed back like a ripple over the long line behind them, young children and aged parents a… - Philip Pullman

"I wish I could answer your question. All I can say is that all of us, humans, witches, bears, are engaged in a war already, although not all of us know it. Whether you find danger on Svalbard or whether you fly off unharmed, you are a recruit, under arms, a soldier."
"Well, that seems kinda precipitate. Seems to me a man should have a choice whether to take up arms or not."
"We have no more choice in that than in whether or not to be born."
"Oh, I like choice, though," he said. "I like choosing the jobs I take and the places I go and the food I eat and the companions I sit and yarn with. Don't you wish for a choice once in a while ?"
She considered, and then said, "Perhaps we don't mean the same thing by choice, Mr. Scoresby. Witches own nothing, so we're not interested in preserving value or making profits, and as for the choice between one thing and another, when you live for many hundreds of years, you know that every opportunity will come again. We have different needs. You have to repair your balloon and keep it in good condition, and that takes time and trouble, I see that; but for us to fly, all we have to do is tear off a branch of cloud-pine; any will do, and there are plenty more. We don't feel cold, so we need no warm clothes. We have no means of exchange apart from mutual aid. If a witch needs something, another witch will give it to her. If there is a war to be fought, we don't consider cost one of the factors in deciding whether or not it is right to fight. Nor do we have any notion of honor, as bears do, for instance. An insult to a bear is a deadly thing. To us... inconceivable. How could you insult a witch? What would it matter if you did?"
"Well, I'm kinda with you on that. Sticks and stones, I'll break yer bones, but names ain't worth a quarrel. But ma'am, you see my dilemma, I hope. I'm a simple aeronaut, and I'd like to end my days in comfort. Buy a little farm, a few head of cattle, some horses...Nothing grand, you notice. No palace or slaves

As I understand it, the Holy Church teaches that there are two worlds: the world of everything we can see and hear and touch, and another world, the spiritual world of heaven and hell. Barnard and Stokes were two — how shall I put it — renegade theologians who postulated the existence of numerous other worlds like this one, neither heaven nor hell, but material and sinful. They are there, close by, but invisible and unreachable.

Once we use the word spiritual, we don’t have to explain anymore, because it belongs to the Church then, and no one can question it.