"Liturgical theology" is often a convenient label for any theology that has loosely to do with worship or Eucharist. In this innovative book, David Fagerberg distinguishes liturgical theology by asserting two characteristics: It is lex orandi (and so manifested in the Church's historic rites) and theologia prima (and so the source of all secondary theology). Liturgy is a place of steadfast encounter because it is the matrix where God, world, and humanity existentially interact. Therefore liturgy is where theological sources function precisely as sources. One becomes a theologian by being formed in the "grammar" of the liturgy. The subject matter of this book is how the liturgical assembly makes theological adjustment to its encounter with God. Liturgy, as "theologia prima," is therefore the basis for all theology, whether done by a believer in the pew, a monk in the cell, or an academic in the study.