Hi Darren,
What is meant by 'no single scripture is of it's own interpretation,' is that no Scripture stands alone as a proof of a teaching. You must have a 'second witness' in the Scripture to prove a truth.
This is from the article 'Twelve Truths to Understanding His Word.'
http://bible-truths.com/twelve.htmTRUTH NUMBER 6
[A] "…that in the mouth of TWO OR THREE WITNESSES every word may be established" (Matt. 18:16).
(B) "…In the mouth of TWO OR THREE WITNESSES shall every word be established" (II Cor. 13:1).
[C] "And I will give power unto my TWO WITNESSES…" (Rev. 11:3).
This particular law of Scripture is constantly violated. We are to have at least a second witness to establish a Scriptural truth or doctrine.
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Jesus tells us in parable of two great witnesses:
"Then said He unto them, Therefore every scribe which is instructed unto the kingdom of heaven is like unto a man that is an householder, which brings forth out of his treasure, NEW AND OLD" (Matt. 13:52).
What "new and old" treasures do "scribes" preserve for us regarding the "kingdom of heaven?" Why the NEW Covenant Scriptures and the OLD Covenant Scriptures, of course. And both the Old (Deut. 17:6 & 19:15), and the New (II Cor. 13:1 & Matt. 18:16) command that we must have two witnesses to establish every Word of God.
TRUTH NUMBER 7
[A] "Which things also we speak, not in the words which man’s wisdom teaches, but which the Holy Spirit teaches; COMPARING [or ‘matching’] SPIRITUAL THINGS WITH SPIRITUAL" (I Cor. 2:13).
(B) "And to this AGREE the words of the prophets; as it is written…" (Acts 15:15).
[C] "These [Bereans]… searched the Scriptures daily, whether those things were SO [Gk: ‘in this way,’ ‘like’] (Acts 17:11).
[D] "AS You have sent Me into the world, EVEN SO have I sent them into the world" (John 17:18, and many, many other such comparisons).
The purpose for comparing spiritual with spiritual is to find a spiritual match. There is a spiritual match for every symbol in the book of Revelation. This is a powerful truth that will open the whole Bible to us.
In the previous truth we learned the need for two witnesses. In this truth we will learn the need for those two witnesses to be a "spiritual match." Let’s now "spiritually match" two witnesses and see the marvelous eye-opening result.
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But we learned that no witness can stand alone. We must have at least TWO WITNESSES to establish the truth of any doctrine. For the simple fact that orthodoxy absolutely refuses to give you a "spiritual match" to these Scriptures, it has enabled them to attach all kinds of unscriptural, extra-scriptural, anti-scriptural heresies to the above Scripture. Why won’t they give you a "second witness," and a "spiritual match" to the above Scripture? Because the only second witness which is a spiritual match to the above Scripture, destroys their whole pagan teaching regarding it, that’s why.
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mercy, peace and love
Kat