Missa Est! is a constructive work in ecclesiology, and particularly the relationship between liturgy and mission in the churchs life. It advances a notion of the church in which liturgy and mission are both given their due without opposing them to each other, subordinating one to the other, or collapsing them into each other. Mission and liturgy are intrinsically related to each other, for the churchs liturgical rites disclose and enact the churchs identity as a missionary community.