" What precisely was “the gospel,” and how did it “work”? What did it mean to be “saved” and indeed to be “justified,” and how might you know that this had happened to you personally? If you were “justified by faith alone,” why should it then matter how you behaved thereafter? Or, if you were truly “born again,” indwelt by the spirit, oughtn’t you now be leading a life of perfect sinlessness? Was there a middle way between these two positions, and if so, how did it make sense? Was faith itself something the individual “did” to gain God’s approval, or was that just smuggling in “good works” by the back door? Did Paul teach “predestination,” and if so, what might that mean? What about the “spiritual gifts”? Just because Paul spoke in tongues, did that mean we should too? Paul was clearly worried, in his letter to the Galatians, that his converts might get circumcised; granted that none of us felt any pressure in that direction, what was the equivalent in our world? Did it mean that Paul was opposed to all “religious rituals,” and if so, what did that say about church life and liturgy and about baptism itself? "
― N.T. Wright , Paul: A Biography