The idea that maybe there really is a God after all, and that it's a cop out to assume that, just because it's unlikely for us to know for sure, therefore no breadcrumb trails about God or religion are really worth following.
I'm unable to describe the magnitude of the amazingness of the world I found, simply by wanting to believe that God is real, and then finding out that the Resurrection actually did happen. Anyone who does enough research on this topic and has a good and honest heart will eventually become Catholic.
God how I wish I had looked into this years earlier, but I didn't because I assumed it was just too unlikely to be worth investigating. What an awfully powerful fallacy.