Complex sentence: He notes that many religious believers not only believe their religion to be meaningful and true in its own context, but claim that it is true against all other possible beliefs; if the language games analogy is accepted, such a comparison between beliefs is impossible.
Split into simpler sentences: He notes that many religious believers not only believe their religion to be meaningful and true in its own context, but claim that their religion is true against all other possible beliefs. If the language games analogy is accepted, such a comparison between beliefs is impossible.