An Internal Argument, Not Only a Comparative One

Article one uses orthodoxy and orthopraxy to compare whole traditions against one another. The pair also cuts within a single tradition, where a body can be orthodoxy-centred by its own official account and still generate sharp internal argument about which beliefs the label actually protects.

The Filioque dispute is the clearest Christian case: a single clause added to the Nicene Creed in the Latin West describing the Spirit's procession from the Father "and the Son," which Eastern churches reject as an unauthorised alteration to a text no local church may unilaterally amend. Both sides treat the dispute as a matter of orthodoxy in the strict sense, correct belief formally stated, rather than of practice, and it remains a live obstacle to reunion precisely because neither side treats it as negotiable local custom.

Judaism's internal argument runs the other way and shows a body contesting which axis matters more. Reform Judaism, from the nineteenth century, reframed the tradition's core around ethical monotheism and conscience rather than around obligation to halakha, deliberately loosening the orthopraxy Orthodox Judaism treats as binding regardless of belief. Each side regards the other as having got the tradition's centre of gravity wrong, not as merely practising it differently, which is exactly the kind of disagreement article one's comparative framework, built to contrast Christianity against Judaism as a whole, is not built to capture on its own.