In recent years, the debate on the relation between religion and politics has attracted renewed attention. One of the reasons is a new awareness of the significance of religious sources for moral and political convictions. Within Western theology and philosophy this may cause a certain tension to a secular view on autonomy. In the ethics of Dietrich Bonhoeffer it is, however, possible to find a notion of Christonomy that exceeds this tension by maintaining the insights of the claim of autonomy and yet qualifying this in a specific Christological sense. Bonhoeffer’s view on Christonomy may therefore serve as a basis for a common ground of moral deliberation and yet point to a qualification of this common ground that moves beyond a separation of the worldly and the Christian.