B.B. Warfield addresses a fundamental question about whether God has given rules for how His church is to governed and how He is to be approached in worship in an address titled "The Mystery of Godliness" in Faith and Life, pp. 375-378. Taking I Tim. 8:16 for his text ("And without controversy great is the mystery of godliness"), Warfield responds to the idea that God has given no such direction.
It is of the more importance that we should note this, that there is a disposition abroad to treat all matters of the ordering of public worship and even of the organization of the Church as of little importance. We even hear it said about us with wearisome iteration that the New Testament has no rules to give, no specific laws to lay down, in such matters. Matters of church government and modes of worship, we are told, are merely external things, of no sort of significance; and the Church has been left free to find its own best modes of organization and worship, varying, doubtless, in the passage of time and in the Church's own pas sage from people to people of diverse characters and predilections. No countenance is lent to such sentiments by the passage before us; or, indeed, by these Pastoral Epistles, the very place of which in the Canon is a standing rebuke to them; or, in fine, by anything in the New Testament.
On the contrary, you will observe, Paul's point of view is precisely the opposite one. He takes his start from the inestimable importance of the Gospel. Thence he argues to the importance of the Church which has been established in the world, so to speak, as the organ of the Gospel — the pillar and buttress on which its purity and its completeness rest. Thence again he argues to the proper organization and ordering of the Church that it may properly perform its high functions. And, accordingly, he gives minute prescriptions for the proper organization and ordering of the Church — prescribing the offices that it should have and the proper men for these offices, and descending even into the details of the public services. His position, compressed into a nutshell, is simply this: the function of the Church as guardian of the truth, that glorious truth which is the Gospel, is so high and important that it cannot be left to accident or to human caprice how this Church should be organized and its work ordered. Accordingly, he, the inspired Apostle — "an Apostle of Christ Jesus according to the commandment of God our Saviour and Christ, our Hope" — has prescribed in great detail, touching both organization and order, how it is necessary that men should conduct themselves in the household of God — which is nothing other than the Church of the Living God, the pillar and ground of the truth. In other words, it is God's Church, not man's, and God has created and now sustains it for a function; and He has not neglected to order it for the best performance of this function.
To imagine that it is of little importance how the Church shall be organized and ordered, then, is manifestly to contradict the Apostle. To con tend that no organization is prescribed for it is to deny the total validity of the minute directions laid down in these epistles. Nay, this whole point of view is as irrational as it is unbiblical. One might as well say that it makes no difference how a machine is put together — how, for example, a typewriter is disposed in its several parts, — because, forsooth, the typewriter does not exist for itself, but for the manuscript which is produced by or rather through it. Of course the Church does not exist for itself — that is, for the beauty of its organization, the symmetry of its parts, the majesty of its services; it exists for its "product" and for the "truth" which has been committed to it and of which it is the support and stay in the world. But just on that account, not less but more, is it necessary that it be properly organized and equipped and administered — that it may function properly. Beware how you tamper with any machine, lest you mar or destroy its product; beware how you tamper with or are indifferent to the Divine organization and ordering of the Church, lest you thereby mar its efficiency or destroy its power, as the pillar and ground of the truth. Surely you can trust God to know how it is best to organize His Church so that it may perform its functions in the world. And surely you must assert that His ordering of the Church, which is His, is necessary if not for the "esse," certainly for the "bene esse" of the Church.