Our friend Wei-Hsein Wan of Torn Notebook (formerly Bumi Dipijak) has posted a quote from Saint Basil the Great, with commentary, illustrating a certain broadness of mind about doctrinal matters, a legitimate variance and pluralism in theological expression, within a common dogmatic framework (the Nicene Creed, sans Filioque, quoted as such in Dominus Iesus 1):
At such a time, then, there is need of great effort and diligence that the Churches may in some way be benefited. It is an advantage that parts hitherto severed should be united. Union would be effected if we were willing to accommodate ourselves to the weaker, where we can do so without injury to souls; since, then, many mouths are open against the Holy Spirit, and many tongues whetted to blasphemy against Him, we implore you, as far as in you lies, to reduce the blasphemers to a small number, and to receive into communion all who do not assert the Holy Spirit to be a creature, that the blasphemers may be left alone, and may either be ashamed and return to the truth, or, if they abide in their error, may cease to have any importance from the smallness of their numbers.
Let us then seek no more than this, but propose to all the brethren, who are willing to join us, the Nicene Creed. If they assent to that, let us further require that the Holy Spirit ought not to be called a creature, nor any of those who say so be received into communion. I do not think that we ought to insist upon anything beyond this. For I am convinced that by longer communication and mutual experience without strife, if anything more requires to be added by way of explanation, the Lord Who works all things together for good for them that love Him, will grant it. (St. Basil the Great, Letter 113: To the Presbyters of Tarsus [emphasis added])
I can certainly see how this sort of attitude can go too far, leading to an extreme theological agnosticism (the kind that got Barlaam in hot water with Palamas). But it is a good corrective, I think, to the extreme theological maximalism and triumphalism one so often finds among partisans of both East and West (and which, in my reading, made permanent the schism and crystallized the extreme opposing points-of-view).