You ask me in effect why I am not a Roman Catholic. If it comes to that, why am I not — and why are you not — a Presbyterian, a Quaker, a Mohammedan, a Hindu, or a Confucianist? After how prolonged and sympathetic study and on what grounds have we rejected these religions? I think those who press a man to desert the religion in which he has been bred and in which he believes he has found the means of Grace ought to produce positive reasons for the change — not demand from him reasons against all other religions. It would have to be all, wouldn’t it?

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]

Letter to Father Peter Milward (6 May 1963)