This paper develops work undertaken by the "After Religious Education" project which seeks to reimagine Religious Education in schools for a context in which both religious and non-religious worldviews are taken seriously. One of the longstanding challenges for RE teachers in schools in England has been how to reconcile the broad range of aims and purposes it is supposed to support in a context in which RE is increasingly perceived as confused, inconsistent, and irrelevant. Through a discussion of selected meanings and histories of 'Bildung', from Eckhart through Heidegger culminating in Biesta's renunciation of the term, this paper considers whether "Bildung" could offer a way to rethink the educational purposes of RE. It explores how the varied and competing purposes of RE might be harmonized partly because this concept provides an educational direction without over-specifying the destination: it invites 'unbidden' aspects to enter educational processes.