Your own assumption that the use of the phrase "common people" is pejorative already labels you.<quoted text>
We are all common people, you're no exception, sorry.
What religion does is give people who choose to believe something they cannot prove (a higher power, etc) is called "faith".
Join the 22nd century already. At least get educated on things you talk about.
In any case, yes, in Seneca's time the less educated believed in a huge array of Cults from all over the Empire, while the more educated generally were versed in the philosophy, literature, and mathematics of the Greeks and took a rational approach, looking down their noses on anti-rational cults.
They were also fully aware that invoking religion was a useful tool in ruling...
Fast forward to today, and watch all the overly pious displays from politicians like Gingrich and Obama (why swear on one bible when you can use 10?). And you don't think they are using religion to manipulate "the common people"?
If you want to turn Seneca's statement into class warfare, be my guest, but I think his observation was a clear sighted one.