“Let us attend!” This is the familiar, urgent instruction directed to all those present in Orthodox Christian liturgy—a call to focus the mind, direct the heart, and attune the senses to what is coming. It is an instruction rooted in the dynamics of collective and individual prayer in the Orthodox Church where, as many emphasize, there is not a tradition of extemporaneous prayer. Ideally, one uses familiar formulae to ask for what one has already received—God’s mercy, for instance—or follows the prototype of Jesus Christ by praying the Lord’s Prayer.