Down the rabbit hole
“Reality isn't what it used to be,” from the novel The Taking.
“Maybe there's nothing impossible tonight. We're down the hole to Wonderland, and no White Rabbit to guide us. If I remember correctly, the White Rabbit was an unreliable guide, anyway,” from the novel The Taking.
“Maybe when all was said and done, the imagination was the most powerful of all weapons. It was the imagination of the human race that had allowed it to dream of a life beyond cold caves and of a possible future in the stars,” from the novel Winter Moon