Life is always in process, and all possible developments cannot be foreseen; there is a time-lag between the first experience of a new way and the discussions of theologians, and then the new way of formulating a doctrine. This means that the practice of the faithful will be in place before official pronouncements; which means that even when the pronouncements are made, life will again have moved beyond that point and the theologians will be trying to follow life.
However, some seem to think that the developments that happened in the past completed everything, save a few minor points. Before Vatican II this was a widely accepted view; but anyone who has taken care to read the documents of Vatican II will see how development of doctrine is very much a work in process; with any issue being revisited for further discussion. As regards the past we can judge what in fact true development was. For the present and the future we must live with risk, not having access to absolute certainty. This means remaining open to truth, no matter from whom or from what it may come. Just another way of saying – we live by faith and not by sight.
Life and growth of the Church, including the development of her teaching, cannot be without conflict; sometimes conflict is painful, but need not involve bitterness or hostility – exclusions and condemnations are not necessary. Those who have most furthered the doctrine of the Church have usually been persons who acted discreetly and patiently, without fearing the truth of their own experience, insight and learning.