Amid all these rejoicings Aslan himself quietly slipped away. And when the Kings and Queens noticed that he wasn’t there they said nothing about it. For Mr. Beaver had warned them, “He’ll be coming and going,” he had said. “One day you’ll see him and another you won’t. He doesn’t like being tied down – and of course he has other countries to attend to. It’s quite all right. He’ll often drop in. Only you mustn’t press him. He’s wild you know. Not like a tame lion.”
-C.S. Lewis, The Lion, the Witch, and the Wardrobe