This presentation suggests that inter-religious dialogue is not limited to asserting common values, but also invites critical interaction on issues about which we differ. Is there any relevance of Christian beliefs in a Triune God when in dialogue with Muslims? This presentation suggests that the trinity is not primarily a metaphysical dogma, but rather a biblical story of a community’s experience of God’s suffering in human history. It is a rich source for a social imaginary of unity in diversity. Both Christians and Muslims imagine that the Great Oneness of God (Ketuhanan yang Maha Esa) can unify radically pluralistic societies. But different religious communities have different experiences of how God values and protects diversity.