Again, if Christianity be an universal religion, suited not simply to one locality or period, but to all times and places, it cannot but vary in its relations and dealings towards the world around it, that is, it will develope. Principles require a very various application according as persons and circumstances vary, and must be thrown into new shapes according to the form of society which they are to influence. Hence all bodies of Christians, orthodox or not, develope the doctrines of Scripture. Few but will grant that Luther's view of justification had never been stated in words before his time: that his phraseology and his positions were novel, whether called for by circumstances or not. It is equally certain that the doctrine of justification defined at Trent was, in some sense, new also. The refutation and remedy of errors cannot precede their rise; and thus the fact of false developments or corruptions involves the correspondent manifestation of true ones. Moreover, all parties appeal to Scripture, that is, argue from Scripture; but argument implies deduction, that is, development. Here there is no difference between early times and late, between a Pope ex cathedrâ and an individual Protestant, except that their authority is not on a par. On either side the claim of authority is the same, and the process of development.
Accordingly, the common complaint of Protestants against the Church of Rome is, not simply that she has added to the primitive or the Scriptural doctrine, (for this they do themselves,) but that she contradicts it, and moreover imposes her additions as fundamental truths under sanction of an anathema. For themselves they deduce by quite as subtle a method, and act upon doctrines as implicit and on reasons as little analyzed in time past, as Catholic schoolmen. What prominence has the Royal Supremacy in the New Testament, or the lawfulness of bearing arms, or the duty of public worship, or the substitution of the first day of the week for the seventh, or infant baptism, to say nothing of the fundamental principle that the Bible and the Bible only is the religion of Protestants? These doctrines and usages, true or not, which is not the question here, are surely not gained by the direct use and immediate application of Scripture, nor by a mere exercise of argument upon words and sentences placed before the eyes, but by the unconscious growth of ideas suggested by the letter and habitual to the mind.
And, indeed, when we turn to the consideration of particular doctrines on which Scripture lays the greatest stress, we shall see that it is absolutely impossible for them to remain in the mere letter of Scripture, if they are to be more than mere words, and to convey a definite idea to the recipient. When it is declared that "the Word became flesh," three wide questions open upon us on the very announcement. What is meant by "the Word," what by "flesh," what by "became"? The answers to these involve a process of investigation, and are developments. Moreover, when they have been made, they will suggest a series of secondary questions; and thus at length a multitude of propositions is the result, which gather round the inspired sentence of which they come, giving it externally the form of a doctrine, and creating or deepening the idea of it in the mind.
It is true that, so far as such statements of Scripture are mysteries, they are relatively to us but words, and cannot be developed. But as a mystery implies in part what is incomprehensible or at least unknown, so does it in part imply what is not so; it implies a partial manifestation; or a representation by economy. Because then it is in a measure understood, it can so far be developed, though each result in the process will partake of the dimness and confusion of the original impression.
This moreover should be considered,—that great questions exist in the subject-matter of which Scripture treats, which Scripture does not solve; questions too so real, so practical, that they must be answered, and, unless we suppose a new revelation, answered by means of the revelation which we have, that is, by development. Such is the question of the Canon of Scripture and its inspiration: that is, whether Christianity depends upon a written document as Judaism;—if so, on what writings and how many;—whether that document is self-interpreting, or requires a comment, and whether any authoritative comment or commentator is provided;—whether the revelation and the document are commensurate, or the one outruns the other;—all these questions surely find no solution on the surface of Scripture, nor indeed under the surface in the case of most men, however long and diligent might be their study of it. Nor were these difficulties settled by authority, as far as we know, at the commencement of the religion; yet surely it is quite conceivable that an Apostle might have dissipated them all in a few words, had Divine Wisdom thought fit. But in matter of fact the decision has been left to time, to the slow process of thought, to the influence of mind upon mind, the issues of controversy, and the growth of opinion ...
From the necessity, then, of the case, from the history of all sects and parties in religion, and from the analogy and example of Scripture, we may fairly conclude that Christian doctrine admits of formal, legitimate, and true developments, that is, of developments contemplated by its Divine Author.