This is incredibly enlightening, thank you!
I'm confused about how we know that elders are involved in the same work of ministry as the apostles? I was told that "ministry" was just really any service (apparently the Gk. word for minister and deacon and ministry are all linked and just mean service), and that all Christians participate in ministry (Eph. 4:12, ESV). So all Christians teach, speak Christ and instruct one another (Acts 4:29-31; Col. 3:16; Rom. 15:14), and thus the only difference between laity and pastors, is pastors have more time to do gospel work, but both are doing gospel work.
We're living in a democratic age when appointment to an office with special duty and authority is, frankly, resented by many. Unfortunately, even quite a few small and independent congregations are led by little dictators; and the people love it so (or seem to). In reaction to all sorts of authoritarian abuses, and in keeping with the egalitarian spirit of the age, not a few have concluded that the problem is elevating particular persons into any designated office. Instead, they prefer to think of their leaders as "first among equals."
In Presbyterianism, which Rutherford advocates per se, the work of ministers and elders (with the help of deacons) carries on in ordinary labor the same essential work that was broadly entrusted to unique apostles, who were
extraordinarily equipped to lay the NT church's foundation. Furthermore, we need to distinguish the general service-oriented Christian life, a general "office" of believer if you will, that flows from our union with Christ--the Prophet, Priest, and King. See Heidelberg Catechism #32.
That general office, reflected in the individual Christian life, does not exhaust the expression of Christ's mediatorial office, which is also demonstrated through his appointed government for his kingdom present among his people in the world. He appointed his apostles for the founding generation of his worldwide enterprise; and we see them in extraordinary power establishing the church locally, and leaving them with ordinary order, worship and discipline overseen by ordinary officers. Christ's personal and all-encompassing authority was devolved and divided to his apostles for their work (so: no one super-apostle, no universal bishop); and they too devolved their authority to the men they ordained to continue their work. But no one can lay another foundation than the one already laid, so
that work is unrepeatable. What remains is the ordinary ministry.
Eph.4:12 is a good verse for consideration in this context, precisely because as it was parsed in earlier ages (see for example the old KJV) "the work of the ministry" among the other phrases was specifically connected to v11, and the list of officers who are
gifts to the church. Rather than "for the work of the ministry" being the desired outcome of the previous "for the perfecting of the saints," as of a series; the three phrases were (and I think ought) to be read in parallel construction. The gifts of the offices or officers in them were: 1) for perfecting or equipping God's host; 2) for the work of THE ministry, the government of Christ's kingdom; and 3) for seeing the whole body built and strengthened to last. This is the venerable interpretation of the text.
The modish preference for social leveling is revealed in many newer translations, which eliminate Paul's parallelism, in favor of regarding the triad as a principal function leading ideally to first one, then another outcome. The parallel construction, by contrast, reckons each part of the triad an area of concern that belongs to the offices. Obviously, there are alternate arguments to be made for preference as to the proper rendering; but it bears consideration how a cultural ethos can impact the
plausibility structures lending support for one over the other.
Does the older reading of Eph.4:12 mean that the saints in general do not minister? Of course not, as all are obliged to love and serve one another, considering one another as better than themselves, looking for opportunity to demonstrate all manner of giving for another's benefit. That is not the issue, but whether Eph.4:12 does or does not teach that there is a government, THE ministry, of Christ's church. Has this fact been obscured and made less of a sure conviction possessed by the church of our time? I suppose it has. Eph.4:12 is not the only text that could support a notion of THE ministry; consider Act.20:24, Rom.15:19, 2Cor.5:18, 6:3, Col.4:17, 1Tim.1:12, 2Tim.4:11, which all may explicitly take such an interpretation. But, being a key text, recent recasting of Eph.4:12 moves a bulwark that once established the principle.
Appointing everyone in the church at the same service--with pastors only doing "more" of the same--actually renders the other ordinary callings of life of lesser value than they otherwise should be regarded. Is a pastor's ministry a "high" calling? Yes, indeed I think it is the highest calling, and therefore the most requiring true Christian character, dedication, sacrifice, and all the marks Paul invokes when he lists out the "must be's" in the Pastoral Epistles. However, everyone's worldly and lawful calling is their designated place of service; and as such is possessed of great dignity in the hands of a respectable Christian. The ditch-digger, the plumber, the farmer, the business executive--they all labor in their work unto God, and so sanctify their tasks.
Hammering a nail or turning a screw is the calling of some Christians, which also is not "gospel work." They do their work, and give to the church, so that true "gospel work" can be done, especially (though not, in the end,
exclusively) by those whose calling is in the church's ministry. The God-glorifying bodily and mental effort of ordinary believers is what makes non-ministerial callings of incalculable worth and dignity, and not because we wish to attach a "gospel" label to them. People so called should with passion and dedication fulfill those non-gospel labors, thereby adorning the gospel of their profession while living in the world and supporting a kingdom that is not of this world.