In the Roman Catholic Church, Synodality has largely been interpreted through the lens of internal concerns, particularly those related to doctrine and church governance, while its possible relation to the political question of peace has remained comparatively underexplored. This paper proposes to interpret the synodal process as a path of resonance, drawing on Hartmut Rosa's theory of resonance, and to consider its potential as a theopolitical resource for peace. Focusing on listening and mutual transformation -dimensions common to both resonance and synodality- it argues that synodality reconfigures ecclesial relationality and articulates a political anthropology of reciprocity. In doing so, it also opens an interreligious horizon, where practices of listening may foster renewed fraternal relations with other religious traditions, particularly Judaism, within a dynamic oriented toward mutual recognition and peace.