As with ceaseless voice they cry

The four living creatures around the throne ceaselessly sing the Sanctus, as reported by the Apostle John in the Book of Revelation (4:6-8). Perhaps St. Paul has this model in mind when he admonishes the Thessalonians to “pray without ceasing” (1 Thess.5:17). Paul has challenged and confused centuries of New Testament scholars with the thought. […]