This is the script of this morning's Thought for the Day on BBC Radio 4's Today programme:

I have just got back from the reading of fat books on holiday. The one that grabbed me this time was Tom Holland's 'Dynasty: The Rise and Fall of the House of Caesar'. It all sounded so contemporary. The voice in my head kept repeating the plaintive phrase from the book of Ecclesiastes, “There is nothing new under the sun”. Power, violence, subterfuge, ego, leadership struggles, populism and politics – it's all there. It always is.

I also kept hearing the line from Proverbs: “Where there is no vision the people perish.” The problem with vision is that it emerges from memory. Rabbi Jonathan Sacks said this week that Judaism is a religion of memory. So, I would argue, is Christianity. Both remind us, for example, that empires come and go, that hubris is ultimately embarrassing, and that history sadly repeats itself. Christianity makes no sense at all without rituals that are there to compel compulsive amnesiacs to re-member their story: in this case that by recalling that we were once slaves, we will refrain from treating other people like slaves; that we are set free to serve; that we are to do justly, love mercy and walk humbly with God (and one another). For Jews the Passover goes to the heart of this memory; for Christians the Eucharist re-tells the story into which we fit ourselves and shape our future.

We can only know who we are if we know from where and from whom we have come. The problems emerge when either we think we have been born into the ultimate 'now' – that nothing valuable went before us – or we choose the bits of memory that are convenient to our present or future self-justifications.

And that is as dangerous for nations, continents and communities as it is for individuals or religions.

With this in mind, and having read about the Caesars, I wonder if every government should appoint a Cabinet Historian to remind it of the past and challenge policy for the longer-term future in the light of experience.

Of course, all readings of history are partial, and memories are always susceptible to selectivity. But, some of the challenges we face (for example, in the light of Brexit) would be informed by a sober re-membering. Memories are short, but how will anyone born in this millennium understand Russia and Ukraine when they have no experience of the Cold War – and a world divided not just by affluence but by starkly competing ideologies? Memory is not quite the same as history, but both can become commodities in struggles for power, as the biblical narrative reminds us.

Well, I won't hold my breath, but without a memory the people cannot form a vision. And without a vision the people perish.

This is the script of this morning's Thought for the day on BBC Radio 4's Today programme:

Recently I was in Stuttgart and took part in a two-hour discussion with the German Foreign Minister, Frank-Walter Steinmeier, and the former Secretary General of the United Nations, Kofi Annan. The theme of the event – which took place before more than ten thousand people – focused on a question: is the world spinning out of control?

It's a good question, isn't it? Austerity at home and protests on the streets; financial and economic brinksmanship in Greece – with the implications for the rest of Europe of a Grexit; the continuing brutality of Islamic State in Syria and Iraq; Ukraine and the confidence of a re-energised Russia; political instability and the threat of climate change. And that's just a sample from today's headlines.

The German Foreign Minister began by saying that the world has never been in such a dangerous place. Kofi Annan claimed that, actually, the world has never been safer. But, both went on to remind the audience of how the world was in the first half of the twentieth century, and only then compare with today.

I listened to this exchange and concluded that they were both right. It depends on your perspective. Only seventy years ago the world buried tens of millions of people who had died as the result of world war. Of course, this had been the second of these: we hadn't actually learned from the so-called 'war to end all wars' just a couple of decades before. I remember, as a small child, the Cuba missile crisis and the pervasive mood of fear. The Cold War itself, with the threat of nuclear annihilation, has also been quickly forgotten.

It seems to me that every generation thinks it might be the last. That the crises and challenges of today are the ultimate ones. That things have never been so bad. A bit like crime statistics: even if the figures go down, people for some reason still feel the fear. There are, of course, other examples.

Well, if you look at what fills the headlines and our screens, the world is in a pretty bad way. And it isn't hard to fuel the fear. But, hope has always defied this sort of thing. The Jews in exile in the eighth and sixth centuries BC faced the horrors of dislocation and alienation, but their poets fired their imaginations, helping them see beyond their immediate experience to what could one day come to be. Christian hope is rooted not in a simple reaction to the present challenges, but in being grasped by a vision of a different way – and then committing oneself to making it happen. The Christian vision of the Kingdom of God involves neither naïveté nor fantasy, but committed hope.

Perhaps what we need today is fewer analysts and commentators, and more poets: holding out a vision that fires the imagination and won't let us go.

Being in a place of scarcity and threat compels us to look through different eyes at our own situation and life. Gaining a first-hand acquaintance with the church in Sudan last week (as I had previously done for eleven years with the church in Zimbabwe) shone a different light not only on who we are as an Anglican church in West Yorkshire, but also how we are in our attempt to fulfil our unique calling.

Add to that a reading of Walter Brueggemann's excellent book The Practice of Prophetic Imagination and the choice before the Dioceses of Bradford, Ripon & Leeds and Wakefield takes on a different (and more radical) complexion. On 2 March the three diocesan synods will vote on whether or not to choose dissolution and the creation of a single new diocese for West Yorkshire and the Dales. During the last two years we have lived with uncertainty as, first, the initial proposals were debated; second, the amended draft scheme was debated; then, third, the final scheme was presented for acceptance or rejection.

So far, no problem. The whole world lives with uncertainty and sometimes the Church needs to grow up and get real when faced with challenges or bewilderments. Uncertainty is one of the facts of life and we, of all people, should learn to live confidently with it. However, how the process has been handled during the last two years raises some important questions that precede the detailed matters of the scheme's content: they have to do with identity, vocation and vision.

Identity

Who is the church? The church must take as its narrative the sweep of the biblical story, read in the light of its experience throughout history. What we learn is that the church's institutional shape must serve its vocation and not have its vocation shaped by its inherited institutional form(s). If the church aims “to create the space in which people can find that they have been found by God” – and to do this by learning the (constantly changing, moving) 'languages' of a culture that never stands still, then it must constantly be willing to sacrifice its inheritance for the sake of its mission. Indeed, this was the motivation behind the creation by the Church of England of new dioceses in the twentieth century, aimed at re-shaping the church to serve new urban communities that hadn't really been there a century before.

The proposals for West Yorkshire do the same for the twenty first century, both responding to the changes in demography, culture and communications and anticipating further changes in the century to come. It would be interesting to see what arguments were used at the time when Wakefield and Bradford were established as separate dioceses by those who thought the change would be negative, retrograde, trendy, unnecessary, unmissional, and so on. I guess they would represent a re-run of some of the 'denial rhetoric' that is being articulated now.

However, these proposals invite the Church of England in West Yorkshire (and beyond – because this could still be put to the General Synod for acceptance even if one of our dioceses votes against it on 2 March), for the first time in several generations, to do what the Church of England used to do in re-shaping itself for the sake of its declared mission.

Vocation

Who is the church for? The church's vocation is a tough one: it essentially asks us to be 'prophetic', not only in word, but in action. By 'prophetic' I mean offering the world the possibility of a different way of seeing and being… even while the old world continues and appears dominant. This is the invitation of the Old Testament prophets: to see a new world whilst the current reality was exile under a powerful empire. Not only do the prophets speak truth about now, but they use language to fire a daring imagination about a different future… a future rooted in hope. At the beginning of his public ministry Jesus poses the same challenge: you can't see how the pure God can come among you again while the unholy pagans (the Roman occupying forces) remain in your land, compromising your worship and blaspheming your faith; but, dare you 'repent' (literally, 'change your mind' – see through a re-ground lens) and begin to live now as if God were present, contaminating the unholy with grace rather than being afraid of being contaminated by the bad stuff? (This is what is going on in Mark's summary of Jesus's message, mission and ministry in Mark 1:14-15.)

Walter Brueggemann draws attention to this when he writes:

… prophetic preaching is the enactment of hope in contexts of loss and grief. It is the declaration that God can enact a novum in our very midst, even when we judge that to be impossible. (P.110)

More suggestively, perhaps, he goes on (p.130f) to expose the discrepancy between what we Christians say and sing, and how we then handle prophetic demands:

There is a tacit yearning in the church for the prophetic. And so the church sings about the prophetic with some vigor… The church sings that way with hope, all the while, in practice, mostly resisting anything prophetic and really wanting no more than a status quo pastorate or priesthood, mostly wanting apostolic faith that “tells” but does not summon too much.

In other words, we don't walk the talk. In relation to West Yorkshire all parties have agreed, articulated and rehearsed the view that change needs to happen and that we cannot just continue blindly into the future. Yet, when specific change is proposed – based on thorough consultation, research and testing alternatives – some of us resist even using our imagination to see how 'a different way' might potentially look, were we to have some courage as well as convictions. What lies before us is not simply a choice about specific proposals for a single diocese, but also (and perhaps more importantly) a challenge to the integrity of our vocation as a church. Given that so-called 'alternatives' have come too late in the process, been simple reactions to specific points that, once addressed and answered (see the 'threat' to funding three cathedrals, for example), are held onto regardless or quietly dismissed in the search for another objection.

Vision

I understand what lies behind the fear of change, loss and uncertainty. (After all, if this scheme goes through, I become the first diocesan bishop to be made redundant – a prospect I don't relish, but for which I am prepared.) But, this is what the church is called to model in every generation – for our rootedness is fundamentally not in our institutional shape (as if this were directly established by God in creation), but in our courageous and prophetic faithfulness to the mission God has entrusted to us.

I will come back again to some of the specifics involved in the proposals, but for now the big question has to do with something deeper, more integral to our identity and vocation, more theological and attitudinal. A new single diocese would bring huge challenges and opportunities. There will be errors, mismanagements and failures. Risk will be felt acutely. Structures – existing or potential – achieve nothing of themselves; all depends on how people lead, work them and creatively attend to their potential as media (parameters) for enabling the vocation to be fulfilled.

I think I am not alone in Bradford, Wakefield and Ripon & Leeds in wanting our decision to be driven by courage, vision, creative commitment, vocational conviction and missional invitation. We must not fail the church and the wider world by being driven by denial, fear, resentment, protectionism or self-interest.

More anon.