It is very upbeat. Early RUSH kind of dealt with sci-fi, and cosmic topics. It sort of looks what a space and time traveler will need. It jumps quickly from the past, present, and future. We are taken to ancient times, Hollywood, and Jupiter.
Bravado talks about the human struggle.
It talks about the sacrifices that people make to achieve their freedom. This is kind of what the Russians might have thought when they won their freedom. The added RAP works great with the context of this song. The message is that an order to live life to your fullest potential, you must overcome your fears and take chances. It is impossible to have a reason for everything that happens.