"I beseech you, in the bowels of Christ, think it possible you may be mistaken." (Oliver Cromwell)
Although this comes from what for me is a very unlikely source, Cromwell's advice is worth heeding. In the debates that are going on within the Anglican Communion, I often sense that some folks on all sides are not open to the possibility that they might be mistaken. I also sense, in me at any rate, a dangerous desire to define myself over against someone else: I am a progressive and not one of those terrible traditionalists!
Avoiding that danger, I see myself as one who is defined by God, who is becoming what God wants me to be - a beloved child of God formed in the likeness of Christ. And that means that I am by definition a sinner wh0m Christ came to save. And if a sinner, then most of the time - maybe all the time - mistaken in my understanding of the Good News.
Acknowledging that I might be - am likely to be - wrong does not mean that I don't stand upon my convictions, that I don't act as I believe God wants me to act. But I hope that I stand and act with a certain modesty, open to the strong possibillity that I'm mistaken and that I will need to stop and go in a new direction.