An unspoken doctrine of every modern bible version
Every modern bible version (NIV, NKJV, ESV, NASB, NLT, etc) carries with it an unspoken doctrine, that is, God has not only failed to preserve his words perfectly, but that his words can be changed and is made subject to man's scholarship.
To date, the underlying text for modern bible versions is still "evolving". The Nestle-Aland text is a critical edition of the New Testament, and the source text of most modern Bible translations. Right now, it is already in its 28th edition.
Not many Christians might know this, that the Nestle-Aland text is under the supervision and control of the Roman Catholic Church (Vatican) through joint agreement with the United Bible Societies (UBS) which owns it.
Therefore, every modern-day "bible" is a product of the Roman Catholic Church one way or another, so that every modern-day "Christian" is a Roman Catholic, one way or another.