The following is from Grace to You:
I've entitled this, this message, I've given it the title of "The Matchless Distinctiveness of the Gospel...The Matchless Distinctiveness of the Gospel." And that is really what this text teaches us. We need to be reminded that the gospel of the Lord Jesus Christ, which is the heart and soul of Christianity, is absolutely unique. It is distinctive; it is exclusive. It is one of a kind in the purest sense of that. That is to say, the gospel of Jesus Christ is unmixable. It is incompatible with any and all other religious ideas and religious beliefs. It cannot coexist with any other means of salvation, with any other religious idea or religious belief. The gospel cannot blend into any religious system in any way, and anybody who thinks it can is absolutely wrong, and that is exactly what our Lord Jesus says in the text before us, whether you're talking about systems of works salvation that call themselves Christian, such as Roman Catholicism, or orthodox church theology, or Mormonism, or Jehovah's Witnesses, or any other kind of Christian cult or form of Christianity, or liberal Christianity or anything in any other religious form whether it is Islam, or any other religion. There is no mingling, there is no mixing with the gospel. That is true particularly of Judaism. Judaism is incompatible with the biblical gospel, that is the Judaism that exists today and the Judaism that existed in the time of our Lord.
The gospel of the Lord Jesus Christ is absolutely unique, matchless and exclusive. And this needs to be stated very strongly in our day because we live in a time which exalts diversity of belief, which exalts individuality, which is content for everybody to have his own religious beliefs as if they all had equal merit. Our day elevates tolerance of all kinds of religious notions. We are a pluralistsic, inclusive kind of universalistic thinking culture. Christianity, of course, is contrary to all of that. Scripture is very clear that there is one God and only one God, there is one Lord and only one Lord, there is one inspired revelation, the Bible, and it is the only God-given revelation. There is only one accurate and correct interpretation of the Bible and there is therefore in the Bible only one plan of salvation. Any suggestion that alters or mixes those singular truths is a corruption with error that has only damning results.