At the start of every celebration of the Mass we hear a short passage from scripture called the Introit, or Entrance Antiphon. The word “antiphon” is a combination of two Greek words: anti and phone, as in “gramophone.” “Anti-phone” literally means a sound in return to another sound; a kind-of call and response, and it is why the antiphons we have in the liturgy are supposed to be sung; they are responsorial texts given us by the Church in the Sacred Liturgy, to which we to make a response. That response is heard here at the Sung Mass on Sundays when we respond in a literal way by singing our response. We do something similar even when we say the Responsorial Psalm. But that outward, audible, and physical response to the text—one that often involves repeating the text over and over in order to affirm its meaning—is only part of the story. In fact, the response we are called to make to these antiphons, as with all liturgical texts, is not simply one made with our lips, but with our whole selves, with our lives. We can say that just as we sing our response, joining in our worship in the context of the liturgy, so also all that are is also called to resound with that response as a lived, real expression of what we believe and who we are in Jesus Christ. As the ancient saying goes, the law of prayer is the law belief; in other words, what we do in worship shows forth our faith.