- 1. Only people who are baptized by the official Church can be saved.
2. Only people who know the words, "Jesus Christ," their application to a particular person at a particular time and place, and the content of certain books written about that time/place, can be saved (because we have to avoid believing in "the wrong Jesus," so we can't believe in Him based on Gnostic or Mormon scriptures, say).
These aren't very satisfactory options, though. They rely on magic, basically, for one, so could more or less never be verified (at least not in our pre-Millennial world). Also, they undermine the value of evangelizing the world, which was the Great Commission, after all.
But two other things, then:
- 1. "Jesus Christ" is not the most true name of the Son. The Holy Spirit Itself is His truest name. That is, it is both an independent person as well as a symbolic power, referring to Christ. So salvation on Christ's name does not mean knowledge of or a "personal relationship with" a specific human man Who dwelt among us thousands of years ago, and Who is not directly visible to us anymore, but rather to faith in the Spirit. And the Spirit, as the most abstract Person of the Trinity, might be seen as implicitly encoded into all sorts of religious systems throughout history and the world. Then salvation does come only from believing on the name of the Son, but without direct reference to the Son. (The Father requires the Son to be the Father, and vice versa, so no religion unaware of the Son is aware of the Father, and vice versa.)
2. At one point it is said that it is enough to confess, "Jesus is Lord," out loud, to be saved. This seems strange, especially if we consider cases of people dishonestly confessing such a thing. However, in the time of the Apostles, to confess such a thing out loud would have tended to be a political statement as much as a religious one. So it is not so much the sentence itself, as the assertion of the sentence under threat of death, that would be a saving grace.
2.2. Therefore, though individual people might be saved by abstract faith in just the Spirit, the necessity of salvation in Christ might have to do with the salvation of the world as a social entity over and above all individuals in it. That is to say, personal salvation stands apart from Jesus, but political salvation does not--anyone who wants to make the world morally better, better rely on the fact that Christianity exists as a moral-political force. This doesn't mean believing in doctrines so much as appealing to the character of authentic Christians (those who actually practice virtues like humility and patience) as part of a global political program, designed to undermine evil government and related structures.