It's the priest's job to express vague sentiments to people who really want to believe. The ones that don't "fit" are quickly forgotten. The few that do - are blown out of proportion by the recipients. It's the same trick used by frauds who claim to predict future, or talk to the dead - throw shit at the wall and see what sticks.
"The fact that a believer is happier than a skeptic is no more to the point than the fact that a drunken man is happier than a sober one." - George Bernard Shaw