"How did we ever get into this mess?" Josh wondered out loud.
"I guess we were just in the wrong place at the wrong time," she said. […] But even as she was saying the words, she was beginning to suspect that there was more to it than that. There was something else going on, something to do with the prophecy that Flamel had referred to, something to do with them. And the very idea terrified her. (19.29)
You are the prisoners of circumstance, of coincidence and chance […] if you believe in such things. (21.12)
"Two months ago, Josh, you should never have asked me for a job, and you, Sophie, should never have started working in The Coffee Cup. But you did, and because you made those decisions you are both standing here with me tonight […] of course, there is a school of thought that suggests that you were fated to take the jobs, to meet Perenelle and me and to come on this adventure."
Scathach nodded. "Destiny," she said. (21.14-15)