"Till it could not offend a fly"

From Dorothy L. Sayers, Creed or Chaos (1949), as quoted in Affirmations of God and Man (1967) edited by Edmund Fuller:

Let us, in Heaven's name, drag Out the Divine Drama from under the dreadful accumulation of slipshod thinking and trashy sentiment heaped upon it, and set it on an open stage to startle the world into some sort of vigorous reaction. If the pious are the first to be shocked, so much the worse for the pious—others will pass into the Kingdom of Heaven before them. If all men are offended because of Christ, let them be offended; but where is the sense of their being offended at something that is not Christ and is nothing like Him? We do Him singularly little honor by watering down His personality till it could not offend a fly. Surely it is not the business of the Church to adapt Christ to men, but to adapt men to Christ.

It is the dogma that is the drama—not beautiful phrases, nor comforting sentiments, nor vague aspirations to loving-kindness and uplift, nor the promise of something nice after death—but the terrifying assertion that the same God who made the world lived in the world and passed through the grave and gate of death. Show that to the heathen, and they may not believe it; but at least they may realize that here is something that a man might be glad to believe. (emphasis added)