St John Henry Newman is frequently remembered as the great convert of the 19th century; far less attention has been paid to the fact that he was also among the most perceptive critics of how conversion itself is pursued, measured and – one might say, with only slight exaggeration – occasionally miscounted.

Newman resists, with characteristic sobriety, the assumption that the vitality of the Church can be gauged by the number of those entering her visible bounds. He relocates the question within a far more demanding horizon: the formation of a Catholic mind capable not only of receiving truth, but of sustaining and integrating it. He understands conversion not as a spiritual headline, or even the decisive moment in the convert’s life, but rather the threshold of a much longer and more exacting process.