Consequently, through the science of textual criticism, man can restore the approximate wording of the original text. Since the concepts are inspired and preserved, the exact words representing these concepts may not be available and may very. Where existing manuscripts differ, the translators made their choice of readings according to accepted principles of NT textual criticism.
Footnotes call attention to places where there was uncertainty about what the original text was.
The best current printed texts of the Greek NT were used. Admittedly, these are errors in the text the modern translations follow, and some of them ignore their own text and translate this passage accurately as in the KJV . In a word, the modern versions do not have all of the words of the Lord and some alleged words are erroneous. Incidentally, these grave concerns are reflected by the fact the KJV outsells all other translations. The Bible translation controversy is not about the science of textual criticism or extant MSS, but it is about he Lord Jesus Christ's promise to preserve His inspired words.