This is a quote from Sinclair Ferguson in the recent book, Reformation Worship, edited by Gibson & Eargney.

The sixteenth-century Reformers shared a deep underlying concern that late medieval worship had become a kind of spectator event. The congregation was largely passive. “Worshipers,” if they could be thus described, were essentially observers of the drama of the Mass, and listeners to the words of the choir. The service of divine worship was not an event in which the congregants were participants so much as spectators. The “quality” of worship was therefore measured not by the holy joy of the worshipers but by the standard of the music, the excellence of the singing of the choir, the aesthetic impressiveness of the drama of the Mass, with its vestments, bells, incense – and, of course, its Latin. Worship was, for all practical purposes, done for you – vicariously.

-xvii