The speech (directed towards Wesley after making a string of poor decisions at the behest of Tom Paris, er, Nick Locarno):
"The first duty of every Starfleet officer is to the truth, whether it’s scientific truth, or historical truth, or personal truth! It is the guiding principle on which Starfleet is based, and if you can’t find it within yourself to stand up and tell the truth about what happened, you don’t deserve to wear that uniform.”
It’s an old pic, so by now you should be good to go. That said, you might still need to roll a double crit on a charisma check to pull it off.