Problem 1: When we take our theological assumptions for granted, challenges to faith make our House of Cards crumble.
As Barbara Brown Taylor writes in her 2008 article for Christian Century, "Failing Christianity" our churches often support us in believing things that we really don't know very much about. Many Christians don't even know what the words that they use to describe their beliefs MEAN. It is important for Christians to learn a bit about the history and vocabulary of Christian belief.
Last but not least, I think theology should have "street value." This might mean that Christians need to find ways to "re-jargoned" or translate their theology into the thought categories of their own culture. This is a huge debate: Is accepting the Christian message a cultural conversion (where one learns the language of the Christian faith) or is the onus of conversion on the Christian (to translate the faith into the terms of the receptor culture)?