I believe that the usage of here is perhaps similar to that of the following sentences.
> **** I am happier than I have ever been in my life.
>
> **** Thank you for coming today (even though you/you all are so busy).
As you can see, it can be used to denote not just a spatial center, but also a span of time or circumstances surrounding a person.
Jim Breen's JDIC also lists " **during; while** " as a definition of .
> (n) (1) inside; in; (2) among; within; (3) center (centre); middle; (4) during; while
Similarly,
> ****
Here, what the author means is "while in .. situation (of living this way).." or "while living this way.."
It may be difficult to comprehend at first, but it is not an uncommon pattern. You should be able to find plenty of other examples as well.