I encourage opponents of women being bishops to review their theology. Perhaps if I were in England I would more strongly use 'urge' rather than 'encourage' given the proximity of time to the likely decision re women bishops in the C of E.
In theology we are talking about God and trying to make sense of God, who God is, what God has said, why God might do some things and not other things, and consequentially this leads to talk about how we might live and organise life on earth. It is important that this talk of God in relation to our lives is responsible because it is not only about securing the truth, it is also about our witness to God in the world.
Part of our responsible talk about God is that we press for an ever deepening understanding of what God's Godness is. For instance, we can understand God to be less than God - a smaller god than the true bigness of God. Ancient Israel often had this deficiency in their theology, not recognising that God was God of all the world. The apostle Paul's great difficulty in his mission was banging heads with those who thought God was only the God of Israel and thus the people of God needed to be made Israelites.
So when we think of God ordering the world the whole counsel of God in Scripture challenges us to remember that God is the God of the whole world, not (as I fear we fall into thinking) God of the church alone. This God is consistent in being God across all dimensions of life and consistent in seeking his will to be done on earth as in heaven in all dimensions of life. In respect of leadership God appoints leaders in the world (Romans 13) as well as in the church. But it would seem odd of God to permit women or men to be leaders in government but only men in the church. To think that God has reason for preferring only men to lead the church is to raise the question what difference God makes in respect of his dominions if the church may not be led by either gender similar to nations.
Of course it could be argued (I imagine it might be, here in the comments) that God really prefers men only to lead in any of God's domains. But that still raises questions such as why God has destined the two great Elizabeths to be Queens of England and Supreme Governors of God's Church of England. We cannot say God has not destined them to their respective roles as events could easily have turned out otherwise (a healthy long living son for Henry VIII! Edward VIII to have fallen in love with an acceptable woman!). Nor can we say that these have not been godly women. In our day Elizabeth II has been an extraordinary witness to Jesus Christ (most recently in her Christmas 2011 message).
There remain questions about what texts such as 1 Timothy 2:12-15 mean within a theology which understands God to be gender neutral about leadership, but these texts can be understood within such a theological understanding (e.g. that the situation of the Ephesian church, hidden from our eyes, required such an apostolic ruling in order to bring godly order to an unruly congregation).
But the more urgent question I put to opponents of women as bishops is the question of Why God would appoint Elizabeth to be queen and not to be bishop? Answers must responsibly address questions about God in relation to church and society, to the eternal kingdom and the kingdoms of this world. I look forward to your comments.
Incidentally, it is of great interest to me that Romans where we find a strong argument concerning God's appointing of governmental leaders (Romans 13) is also the Pauline book which most fulsomely talks about church life being led by a mixed gender array of leadership (Romans 16).