I think Brian is singing about religion, or lack thereof. He's talking to someone who is maybe thinking about abandoning his/her belief system, and he's saying "Hey, we've all been in this situation. Come join us, and make some noise, even though you've been told not to."
I think Brian is singing about religion, or lack thereof. He's talking to someone who is maybe thinking about abandoning his/her belief system, and he's saying "Hey, we've all been in this situation. Come join us, and make some noise, even though you've been told not to."