Just as important as the verbal constituent of the speech itself is it's delivery. They are 50/50, in short this means a speech must tell it's story to one not speaking the language it is composed in. We all love listening to Hitler because of this, this explains his success. A congruency between the content and the energy, energy is much more important to human nature than content.
Remember, nobody cares about what you say if your saying it in a shit way. You could bury the most revolutionary ideas in deep language and codes and talk amongst each other but nobody would care, this is what cucked culturally stale countercurrents does for example. You have to not hold back.
https://www.youtube.com/watch?v=EV9kyocogKo