Let it be granted, then, as indisputable, that there are no two opinions so contrary to each other, but some form of words may be found vague enough to comprehend them both. The Pantheist will admit that there is a God, and the Humanitarian that Christ is God, if they are suffered to say so without explanation. But if this be so, it becomes the duty, as well as the evident policy of the Church, to interrogate them, before admitting them to her fellowship. If the Church be the pillar and ground of the truth, and bound to contend for the preservation of the faith once delivered to it; if we are answerable as ministers of Christ for the formation of one, and one only, character in the heart of man; and if the Scriptures are given us, as a means indeed towards that end, but inadequate to the office of interpreting themselves, except to such as live under the same Divine Influence which inspired them, and which is expressly sent down upon us that we may interpret them,—then, it is evidently our duty piously and cautiously to collect the sense of Scripture, and solemnly to promulgate it in such a form as is best suited, as far as it goes, to exclude the pride and unbelief of the world.
(source: Newman Reader – Arians of the 4th Century – Chapter 2-1)