Abstract:
The 2024 revision of the Pemahaman Bersama Iman Kristen (PBIK, The Common Understanding of Christian Faith) addresses the problem of how Indonesian churches employ a Trinitarian framework to maintain ecclesial and doctrinal unity while engaging with Indonesia’s polycrisis. By collecting data through document analysis of PBIK 2024 as well as practical theological reflection, this article explores four key loci in PBIK 2024: the Trinitarian perspective, ecological stewardship, the missionality of the church, and ecclesial hermeneutics. The authors propose “faithing ecumenically” as a dynamic model for Indonesian churches to embody “ecumenism in action,” responding to their diverse challenges.