Sorry, me again. Just read this in Keller’s article (which I recall being a line of argument in Reason for God):
But if, as the Bible teaches, our souls will go on forever, then just imagine where these two kinds of souls will be in a billion years. Hell is simply one’s freely chosen path going on forever. We wanted to get away from God, and God, in his infinite justice, sends us where we wanted to go.
Does the Bible teach ‘our souls will go on forever’? Is that a sort of truism of evangelical theology, which isn’t actually biblical? It seems to be a prerequisite for believing in eternal hell, so maybe that’s why it’s a popular idea for people who hold that view.