I get annoyed when someone knocks priestly celibacy by saying an unmarried man can’t know anything much about marriage. That’s silly. A priest may not know marriage from the inside out, but he knows countless marriages from the outside in.
So even though I don’t preach often about marriage, I feel capable enough when I do.
But I’m not so sure of myself when it comes to preaching about suffering. I’ve suffered very little in my life so when I speak to others about their suffering, I tread very carefully.