I realise that a certain fervour in persisting with optimistic hope for true, global Christian unity can, at times, present as minimising difficulties or as a wistful love for the forms of Christianity with which Anglicans are not yet in unity ... thus, perhaps, begging the question why I have not swum across the Tiber or the Bosphorus!
Also, following various debates here and there sparked by the Pope's recent visit to Britain, I do realise that the word 'optimistic' in the sentence above should be underlined in triplicate because the unshakeable conviction of the one Roman who matters on questions of unity, the holder of the papal office, is that he is the Vicar of Christ and Successor of Peter, so unity in Christ (upon which all Christians agree as desirable) must be unity with Christ as represented on earth in his Vicar (upon which many Christians disagree).
In reality, the logic of the situation is that my hopes for global Christian unity this side of eternity are necessarily hopes that Rome might change its mind. Cue images of ice creams on an equatorial beach at midday remaining frozen!
Nevertheless I am willing to persist with my hope! I cannot do much about Rome's mind at this stage. But can I (and many others, including those with greater luminosity of theological intelligence and ecclesial wisdom) continue to work for the truth on which unity is always based? Can this work be such that, this side of the Tiber and the Bosphorus, we can come together in the truth of the gospel? Therein lies a great question for Protestants to consider. Divided as we are we have no corporate strength to our witness that Rome is in error on key matters concerning unity (e.g. on their understanding of the character of the papal office as 'Vicar of Christ').
In the end questions of whether we who claim to be 'in Christ' are members of one body of Christ go well beyond which stole the Pope wore. They go to the heart of what it means to be those who have protested against Roman teaching and found ourselves also protesting each other's teaching!
ADDENDUM: reminder to commenters. No Anonymous comments!