Does this passage trouble you? Do you hate to think of anyone perishing? Rejoice, dear friend. You share the heart of God, who doesn't want anyone to perish. He won't force the affections of the heart. He'll take every inkling that someone loves truth and nourish it with more. And He wants to use you in the process.
Don't let Paul's words confuse you. Let them energize you to find those He wants you to share with, so you can love the truth together.