Continuing on with my series on the Seven Notes, I would call them tests, which Venerable John Henry Cardinal Newman developed for determining whether some aspect of Church teaching is a development of doctrine or a corruption of doctrine. We began with Note Six-Conservative Action Upon Its Past, and I would highly recommend that any one who has not read the first post in the series read it here before proceeding with this post. We then proceeded with an examination of the First Note-Preservation of Type here. This post will deal with the Second Note-Continuity of Principles.
Newman distinguishes in this Note between a principle and a doctrine:
Principles are abstract and general, doctrines relate to facts; doctrines develope, and principles at first sight do not; doctrines grow and are enlarged, principles are permanent; doctrines are intellectual, and principles are more immediately ethical and practical. Systems live in principles and represent doctrines. Personal responsibility is a principle, the Being of a God is a doctrine; from that doctrine all theology has come in due course, whereas that principle is not clearer under the Gospel than in paradise, and depends, not on belief in an Almighty Governor, but on conscience.