One has often been asked by incredulous, though well-meaning, people—and almost apologetically—‘Why did you become a Catholic?’ The suggestion being that there must be some explanation to account for such a strange, even a remarkable, lapse from rational behaviour on the part of one supposed to be some sort of scientist. The question is not well put. I suppose that none of us can say truthfully and certainly why we do anything. It would be better to ask not why, but how, did a man become a Catholic; and this is the question I shall attempt to answer, so that next time I am asked why I became a Catholic I can just hand over this number of New Blackfriars. Perhaps even more alarming and difficult to give a direct answer to is the question: ‘When were you converted?’ Perhaps I had better deal with that one first.

Some people, it would seem, have peculiar notions about what is called ‘conversion’, as though it were some sudden and dazzling experience (it may be with some people; I do not know). So, we are led to suppose, this is what happened on the road to Damascus, but if that dramatic incidence, that traumatic vision, occurred as described, we might recollect that Paul was a highly religious Jew, and so was Jesus, a Jew preaching unto Jews in the tradition of Jewish thought and expression. And we might also bear in mind that when we read that Augustine was converted by Ambrose that Augustine was a Neo-Platonist and was already, so to speak, half-way there. So, if we may compare little things with big things, we come to me, which is embarrassing, but obviously I cannot talk about myself without some ‘I’s and ‘me’s.