About a year ago I was asked if I would present a paper on the theology of laity to a conference whose title was “Patterns of Priesthood”, and whose purpose was to “attempt to open up the ground for a discussion of the subject of ministry and communion”. The inclusion of a paper on laity seemed to me then, and seems now, both significant and awkward. Primarily it is a phenomenon to be rejoiced at, in that discussions of priesthood and ministry cannot take place without a thoroughly ecclesial sense of the whole people of God. The point is clearly being made that the theology of laity—or “laicology”—is, like the theology of ministry, or of ordained priesthood, just one aspect of ecclesiology; all these subjects are concerned with looking at what it means to be Church, each from its particular angle. In expressing this we are, of course, indebted to the work of Yves Congar; in his substantial work on laity, he stressed that the purpose behind a theology of laity was fundamentally the reworking of ecclesiology and, in particular, the complementing of a dominant “hierarchology”. Following in this tradition we can recognise the complexity of ecclesiology, where studies of priesthood, laity, religious life and so forth are distinctive, but not discrete. Our basic concern, whether we are talking about laity, the ordained, hierarchical structures or charismatic gifts, is always the same: the Church as a living and structured community, whose identity is found in sharing in Christ’s ministry in a rich variety of ways.