The Russian Orthodox Church, which I converted to in 2018, has disgraced itself in the years since. Its Patriarch Kirill has oiled up to Vladimir Putin and his war effort on every possible occasion since Russia invaded Ukraine. My feelings about this strand of Christianity may be highly ambivalent now: what good is its staggering beauty if it fails to properly call out mass murder? How is Putin, as we’re constantly told, a ‘devout believer’, when it seems he’s simply ticking his way through outraging the Ten Commandments? But my fondness for some of its rituals, including Orthodox Lent, which...