"To claim, therefore, inerrancy for the King James Version, or even for the Revised Version, is to claim inerrancy for men who never professed it for themselves"

This quote by William B. Riley is describing the suggestion of Biblical inerrancy, which is the belief that the Bible lacks mistake. Riley is suggesting that it is wrong to declare that the King James Version or the Revised Version of the Bible is inerrant, as the people who created these variations never ever claimed that they were without mistake. He is indicating that it is incorrect to associate a belief to a person that they never held themselves. Riley is recommending that it is very important to be aware of the beliefs of individuals who produced these variations of the Bible, and also to not think that they held ideas that they never ever professed. He is highlighting the relevance of understanding the ideas of individuals who developed these variations of the Bible, and also not to presume that they held ideas that they never ever professed.