I ran across this interesting quote detailing the instructions Pope Gregory I gave to Augustine of Canterbury (not to be confused with Augustine of Hippo) as he prepared to embark on his mission to England:

Your brotherhood is familiar with the usage of the Roman Church since you have very pleasant memories of being raised and nurtured in that usage. But it seems to me that you should carefully select for the English Church, which is still new to the faith and developing as a distinct community, whatever can best please Almighty God, whether you discover it in the Roman Church, or among the Gauls, or anywhere else. For customs are not to be revered for their place of origin; rather those places are to be respected for the good customs they produce. From each individual church, therefore, choose whatever is holy, whatever is awe-inspiring, whatever is right; then arrange what you have collected as if in a little bouquet according to the English disposition and thus establish them as custom.

There is much to appreciate here. A couple of things stand out to me. First, Gregory carefully avoids imposing an artificial uniformity in worship practices. Augustine was given the freedom to be discerning, even eclectic, in adapting Christian worship to an English context. And second, Gregory also provides several helpful tests for weighing the merits of various worship practices. Are they respectable and good? Are they holy, awe-inspiring, and right? And, most importantly, are they pleasing to God?