“Let us learn from this passage, that the apostleship is not an empty title, but a laborious office; and that, consequently, nothing is more absurd or intolerable than that this honour should be claimed by hypocrites, who live like kings at their ease, and disdainfully throw away from themselves the office of teaching. The Pope of Rome and his band proudly boast of their succession, as if they held this rank in common with Peter and his companions; and yet they pay no more regard to doctrine than was paid by the Luperci, or the priests of Bacchus and Venus. And with what face, pray, do they claim to be the successors of those who, they are told, were appointed to be preachers of the gospel? But though they are not ashamed to display their impudence, still with every reader of sound judgment this single word is sufficient to lay prostrate their silly hierarchy—that no man can be a successor of the apostles who does not devote his services to Christ in the preaching of the gospel. In short, whoever does not fulfil the duties of a teacher acts wickedly and falsely by assuming the name of an apostle; and—what is more—the priesthood of the New Testament consists in slaying men, as a sacrifice to God, by the spiritual sword of the word. Hence it follows, that all are but pretended and spurious priests who are not devoted to the office of teaching.” 
 John Calvin and William Pringle, Commentary on a Harmony of the Evangelists Matthew, Mark, and Luke, vol. 3 (Bellingham, WA: Logos Bible Software, 2010), 383–384.