Most every aspect of Christianity is involved—from whether it's preserved 'the Bible' to how to imagine Jesus.

The general religious effort to see Christianity as a set of behavioral codes that borrows from Old Testament law is seriously critiqued. How does one follow the Ten Commandments, for example, if one doesn't observe the Sabbath?

If a new "day" has begun, a new Creation, a new world, then following some old "rules" isn't the point at all.