“The Holy Ghost called them also Bishops, that is to say, watchmen over the flock, to show that it is not an honor of idleness to be called to this state, and therefore that he must not be idle, but know that he is sent to go about the saving of souls, and therefore must give himself to it and be watchful therein, and take pains about it.”

– John Calvin, sermon 20, in Sermons on the Epistles to Timothy & Titus