What about the idea that the OT sacrificial system was symbolic, and not based on something needing to be done for forgiveness (at least not in the sense that is normally put forward)?

Also, what about the comparison of Jesus with the passover lamb (1 Cor. 5:7), which, if you read the account, had nothing to do with forgiveness of sin? And also, how does the passover lamb help to define the sacrificial system?

Also, if anyone is interested, I have been doing some thinking and discussing with a friend about these issues on our blog. justtwoguys.blogspot.com