Costly Perennialism: Finding Incompleteness Within Each Tradition

The distinction between 'cheap perennialism' and 'costly perennialism' names one of the most consequential fault lines in pluralist thought. Cheap perennialism — the assertion that all traditions converge on a shared underlying truth — is a familiar move in interfaith and cross-cultural discourse. Its appeal is obvious, and its failure is structural: it imposes unity from the outside, overriding the internal phenomenology of traditions whose existential grounding depends precisely on their specificity. A belief system flattened into a vague universal loses its capacity to stabilize anyone. The move is generous in intent but corrosive in practice.

Costly perennialism, as articulated by Garner, demands something fundamentally different. It requires entering the internal consistency of each worldview — not to deconstruct it from a privileged external vantage, but to locate what Garner terms the 'Gödel point': the juncture where a tradition's own logic discloses its Incompleteness, where the map reveals itself as not the territory. This is not relativism. It is the discovery, from within, of an authentic opening toward otherness that does not betray the tradition's core commitments.

The practical implications are staggering. This would require deep collaboration among scholars and practitioners embedded in Christianity, Islam, Buddhism, secular humanism, and other major frameworks, each doing the painstaking work of finding their tradition's internal grounds for epistemic humility. The difference between asserting convergence and demonstrating, from inside each system, why convergence cannot be asserted but space for the other nonetheless exists — that difference separates a platitude from what Garner frames as a Manhattan Project-level civilizational undertaking.