Faith In The Cannon 

The basis of Christianity is found in the authority of Scripture. If we cannot identify what Scripture is, then we cannot properly distinguish any theological truth from error.

What measure or standard was used to determine which books should be classified as Scripture? A key verse to understanding the process and purpose, and perhaps the timing of the giving of Scripture, is (Jude 3), which states that a Christian's faith “was once for all entrusted to the saints.” Since our faith is defined by Scripture, Jude is essentially saying that Scripture was given once for the benefit of all Christians. 

Isn't it wonderful to know that there are no hidden or lost manuscripts yet to be found, there are no secret books only familiar to a select few, and there are no people alive who have special revelation requiring us to trek up a Himalayan mountain in order to be enlightened? We can be confident that God has not left us without a witness. The same supernatural power God used to produce His Word has also been used to preserve it.