(cont) When a word ceases to be a term of description and becomes merely a term of praise, it no longer tells you facts about the object: it only tells you about the speaker’s attitude to that object. (A ‘nice’ meal only means a meal the speaker likes.) A gentleman, once it has been spiritualised and refined out of its old coarse, objective sense, means hardly more than a man whom the speaker likes. As a result, gentleman is now a useless word. We had lots of terms of approval already, so it was not needed for that use; on the other hand if anyone (say, in a historical work) wants to use it in its old sense, he cannot do so without explanations. It has been spoiled for that purpose.
Now if once we allow people to start spiritualising and refining, or as they might say ‘deepening’, the sense of the word Christian, it too will speedily become a useless word. In the first place, Christians themselves will never be able to apply it to anyone. It is not for us to say who, in the deepest sense, is or is not close to the spirit of Christ. We do not see into men’s hearts. We cannot judge, and are indeed forbidden to judge. It would be wicked arrogance for us to say that any man is, or is not, a Christian in this refined sense. And obviously a word which we can never apply is not going to he a very useful word. As for the unbelievers, they will no doubt cheerfully use the word in the refined sense. It will become in their mouths simply a term of praise. In calling anyone a Christian they will mean that they think him a good man. But that way of using the word will be no enrichment of the language, for we already have the word good. Meanwhile, the word Christian will have been spoiled for any really useful purpose it might have served.
You can make it impolite to admit you can tell the difference between blue and green, because some people are blue-green color blind. That doesn’t mean people will stop being able to tell or that they won’t care about the difference between blue and green any more. That doesn’t mean blue is better or worse than green. It means people can tell and they know they can tell and they care that there is a difference and they’re going to rebel against being told to pretend they can’t tell or shouldn’t care.
Likewise, you can tell people it would be kind if they’d act as if they don’t know the difference between a man and a woman. They might do it to be kind, but they still do know the difference and they still do care. When the ability to tell the truth is supressed in favor of pretending one doesn’t or can’t know the truth and the truth itself is made into something offensive or criminal, though, people are going to rebel.