Mark 16:17-18 - Exposition

And these signs shall follow them that believe . Such evidences were necessary in the first dawn of Christianity, to attract attention to the doctrine; but our Lord's words do not mean that they were to be in perpetuity, as a continually recurring evidence of the truth of Christianity. St. Gregory (on 1 Corinthians 14:22 ) says, "These signs were necessary in the beginning of Christianity. In order that faith might take root and increase, it must be nourished by miracle; for so even we, when we plant shrubs, only water them until we see that they are taking root, and when we see that they have rooted themselves, we cease to water them. And this is what St. Paul means where he says 'Tongues are for a sign, not to those who believe, but to the unbelieving' ( 1 Corinthians 14:22 )." In my name shall they cast out devils . St. Mark, of all the evangelists, dwells most perhaps on this, as characteristic of our Lord's work, and as the evidence of his supreme dominion over the spiritual world . They shall speak with new tongues . This was the first intimation of the great miracle to be inaugurated on the day of Pentecost. The gift was continued but for a very limited time. They shall take up serpents. The instance of St. Paul at Melita ( Acts 28:3-5 ) would be familiar to St. Mark's readers. And if they drink any deadly thing, it shall in no wise hurt them . There are some few traditionary notices of the fulfillment of this promise; as in the case of "Justus Barsabas," mentioned by Eusebius ('H.E.,' 3, 19), and of St. John, mentioned by St. Augustine. It may be observed of this passage, that no one could have interpolated it after the cessation of the signs to which it refers, which took place very early.