But we are not of those who shrink back to destruction, but of those who have faith to the preserving of the soul (Hebrews 10:39).
Again, we’re not talking about whether eternal life is possible for someone who can’t for some reason put their faith explicitly in the real Jesus. It has to do with backsliding. Backsliders (“those who shrink back”) backslide to destruction. For some reason the author of Hebrews mentions it a lot.