"But then we have to leave, have to. It's always been that way, and it will always be that way, Jane. That's just.. how it works," is a quote from James Patterson's book Sundays at Tiffany's. It suggests a sense of unavoidable separation or loss that characters in the story experience, emphasizing the permanence of certain emotional or life circumstances.

The quote reflects themes of inevitable change and the acceptance of life's transitions. It highlights the idea that some things are beyond control, and individuals must come to terms with these realities, which can be a central part of the story's exploration of relationships and personal growth.