At the climax of the 1934 film The Black Cat, Boris Karloff recites a “black mass” over a swooning Jacqueline Wells:

Cum grano salis. Fortis cadere cedere non potest. Humanum est errare. Lupis pilum mutat, non mentem. Magna est veritas et praevalebit. Acta exteriora indicant interiora secreta. Aequam memento rebus in arduis servare mentem. Amissum quod nescitur non amittitur. Brutum fulmen. Cum grano salis. Fortis cadere cedere non potest. Fructu, non foliis arborem aestima. Insanus omnes furere credit ceteros. Quem paenitet peccasse paene est innocens.

This sounds marvelous in Karloff’s portentous baritone, but it’s weaker in translation:

With a grain of salt. A brave man may fall, but he cannot yield. To err is human. The wolf may change his skin, but not his nature. Truth is mighty, and will prevail. External actions show internal secrets. Remember when life’s path is steep to keep your mind even. The loss that is not known is no loss at all. Heavy thunder. With a grain of salt. A brave man may fall, but he cannot yield. By fruit, not by leaves, judge a tree. Every madman thinks everybody mad. Who repents from sinning is almost innocent.

He might have added Omnia dicta fortiora si dicta Latina: “Everything sounds more impressive in Latin.”