Italian Archbishop on the Sin of Halitosis, and the Automatic Excommunication It Incurs

If he's not discussing bad breath so heinous as to knock another down, (or the unpleasantness attendant upon people who spit when they talk,) and this is not a translation problem,  I am hard pressed to know what in the world Archbishop Rino Fisichella means here:

“I would say that we need to understand well ‘physical violence,’ because sometimes words, too, are rocks and stones, and therefore I believe some of these sins, too, are far more widespread than we might think.”

"Physical," in common with many words, has an actual meaning, you know?
It means something.
Harsh words are "physical violence"?..."PHYSICAL VIOLENCE"?
Really?

"'Literally'? .....'LITERALLY'?"