Thanks caldrail. Of course, I'm sure that the religious lives of Romans were across the board from irreverent to devout, as with people today. This topic came to mind because I found it hard to believe that the majority of Romans only paid lip-service to the gods whenever it benefited them, given the enormous structures built and the elaborate rituals performed in their names. That is one of the reasons I was hoping to see if anyone could direct me to a primary source which might discuss personal feelings towards the gods apart from the desire to gain something from them. Apuleius seems to be the only good example of this I can find, despite it being a work of fiction. Cato the Elder also seems to hint at it, but just barely.
Other Cato- Yes, I can imagine facts to the contrary of what I am thinking. If that weren't the case, not only would I not bother researching the subject, I wouldn't have asked for information regarding it. My hypothesis is that at a good deal of Romans experienced their religion on a deep and personal level, apart from seeing it merely as a means of reward, protection, or political advancement. I would be as satisfied with a source that could conclusively deny that as I would with one which could support it.