I am torn on this, actually, finding that while the book of Revelation presents us with ‘new things’ and is very much a Gospel itself, I am unsure as to whether to use it as a source of Doctrine, especially the more so since there is generally not a consensus on the method of interpretation…
Personally, I think that the text quoted is directed to Christians we are in danger of becoming lukewarm, a timeless application, but limited to Christians only.
But, I guess the bigger question is whether or not John’s Apocalypse should be used for doctrinal purposes. I am of the opinion that any approach to Revelation which attempts to extract doctrine should be minimal at best.
What is yours?