I continue to reinforce my theory that there are applications for practically everything that comes to mind, and religious themes are not going to be an exception on our Macs.
MacSword allows us to access the Bible on Mac OS X through any application thanks to the use of the Services, but it also gives us a GUI in which we can search for what we want in said book.
I personally am not going to get much of it because as a believer I have little, but as a curiosity you may be interested. It is totally free.
Link | MacSword