What Is the Mass?

In the sacrifice of calvary, we're sort of mystically present at the crucifixion. One of the best descriptions ive ever heard from my spiritual drector about what to do with mass is the same thing you do at calvary. What would he then do if you were there? You wouldn't understand a word they're speaking latin. The leader of our movements being c i have no idea what's going on. To just be kind of bewildered.