This book is a fantastic little submachine-gun-magazine of pragmatic ecumenical twenty-first century theology done as close to perfectly as we're likely to get - by Lesslie Newbigin, who I definitely need to check out more by. I'm going to hammer this one out really briefly because Newbigin is so kindly deft a writer that even a work as philosophically insightful as this 83-page banger can, I'd hazard to think, be summarized properly in a post short enough that I won't even need to scroll down during its composition. Though I've thought that before...
Enough rambling!
In part one, we are walked through the theological basics of God's authoritativeness; as well as various factors in modernity's suspicion of this. He then further explicates the external and internal means by which authority can be 'knowingly' affirmed; as well as linking concepts, faith, and grace - and by far the best Christian perspective on postmodernism that I have seen or read anywhere, hands down.
In part two, he takes us through the conceptual & actual mediation of divine authority, which happens through four chief channels: Scripture, Tradition, Reason, and Experience; none of these can be fully ignored through conglomerations of the others, nor can anyone rightly expect divine authority mediated only through one or two to hold much sway.
So then in part three, he finishes with some reflections on how Christians can attest to the truths of Christianity by mediating God's divine authority through these four channels, with some fantastically practical pointers given as to how to do this effectively in our post/modern contexts.
Hey! I did it! A post that thought it would be short and was short! Seriously though, this should be compulsory reading for all pastors, preachers, Christian thought-leaders and whoever else. It's just jam-packed with applicable truth, and you can read it in a couple of hours. So you may as well take the full afternoon, and read it thrice.