Theologically, while John held a very orthodox Christian position, he had a capacity to engage with people from across the broad Christian spectrum. Another rare gift. In my opinion his book that expresses that orthodoxy most eloquently is Science & Christian Belief: Theological Reflections of a Bottom-up Thinker based on his 1993–1994 Gifford Lectures. Here John reflects on the Nicene Creed both theologically and scientifically in the light of the best of modern science. As well, he placed much emphasis on the centrality of the resurrection as a strong basis for hope. Aspects of his thought here may be found in Tom Wright’s Surprised by Hope.
John was also able to engage with other faiths without compromising Christian faith. He often reminded us that different faith traditions actually make rather different truth claims. But for him that was a reason to keep dialogue open.
John’s other books are all, of course, excellent in their own way. They are all deliberately relatively short and address one or more specific issues. This makes them readable and accessible resources.
After 1979, John focussed on encouraging and enabling good conversation and dialogue amongst and between scientists and theologians. Establishment of the ISSR was consistent with this and he served as its first President.
John certainly believed in the the unity of knowledge and one reality: the world of our experience that we seek to describe scientifically. Further, he was a critical realist believing that truth, whether scientific or theological, needs to be carefully assessed. This is a big theme and there is not space to deal with it in any detail here.
In the following we get a taste of some of his key insights.
If we are seeking to serve the God of truth then we should really welcome truth from whatever source it comes. We shouldn’t fear the truth. … The doctrine of creation of the kind that the Abrahamic faiths profess is such that it encourages the expectation that there will be a deep order in the world, expressive of the Mind and Purpose of that world’s Creator. It also asserts that the character of this order has been freely chosen by God, since it was not determined beforehand by some kind of pre-existing blueprint … As a consequence, the nature of cosmic order cannot be discovered just by taking thought … but the pattern of the world has to be discerned through the observations and experiments that are necessary in order to determine what form the divine choice has actually taken. (Quantum Physics and Theology: An Unexpected Kinship, 2007).
Read it all.