The Art of Dying Well continues, with a look at the three theological virtues: faith, hope, and charity/love.
“Heretic” isn’t a term that gets used much these days, which is just as well, since it’s so misunderstood of a term and applies to very few people. But I should probably note, in connection to comments that Bellarmine makes, that you’re not considered a heretic unless you know for sure that something is true that is taught by Jesus’ Church, and you turn away from that truth on purpose. (Especially if you do it just to be different. Haeresis = difference, IIRC.) If you purposefully deny something that you do know is true, of course your faith must be feigned. And logically, one wouldn’t expect that you’d get any help in learning how to live or die well from playing make-believe games about religion.
But if you don’t know that something is true and therefore don’t believe the true thing, you’re not a heretic; you’re just unlucky and ill-informed. So Bellarmine isn’t saying that you have to be Catholic to have any chance of going to heaven.