The deductions from this are easy to see. For two things chiefly follow, specially declarative of the nature of the Primacy, and shewing its intent, to be the cause and efficient principle of that unity by which the Church of Christ is one visible body. First, there follows the _duty_ laid upon all the faithful, of being joined with Peter, if they would not fall from those promises with which Christ has most bountifully enriched His mystical Body, being no other than that which reverences Peter as its visible head. Secondly, there follows Peter's _jurisdiction_, in virtue of which he enjoins all to form one communion and society with him, as well as effects, defends, and maintains it. Now, nothing can be stronger than this ordinance of Christ, either to prove a Primacy of supreme jurisdiction, or to unfold its purpose of effecting and maintaining unity. The same is the bearing of another type no less remarkable, and no less adopted to explain the whole matter. For, as Israel, "according to the flesh," was the shadow of the "Israel of God," which was "according to promise:"[3] and as the kingdom of Israel was a type and ensample of the kingdom of heaven, the approach of which Christ proclaimed in these words, "The time is fulfilled, and the kingdom of heaven is at hand:" so the twelve sons of Israel, the heads of the Israelitish race, represented and imaged out those Twelve whom Christ chose, made princes in His Church, and endowed with supreme authority to build up that Church's structure, and enrich it day by day with new accessions of spiritual children. Of this type our Lord's words are the strongest guarantee: "Amen, I say unto you, that you who have followed Me, in the regeneration, when the Son of Man shall sit on the throne of His Majesty, you also shall sit on twelve thrones, judging the twelve tribes of Israel." And, again, in the very discourse where He sets forth the future Superior, "I dispose to you, as My Father disposed to Me, a kingdom; that you may eat and drink at My table, in My kingdom; and may sit upon thrones, judging the twelve tribes of Israel."[4]