The most memorable part of the use of non-violent action by the blacks and whites who supported desegregation and equal rights, was that they kept to their cause, and continued to use non-violence no matter how rough it got. That's what was most impressive is that the demonstrators in actions like sit-ins and the Freedom Rides, kept going because they believed strongly enough to be beaten and arrested. And that was shown heavily throughout the film, with people like Jim Zwerg, Diane Nash, and other participants. It was college students like Zwerg, and Nash that faced violence and jail time, yet still persevered because they believed in their cause. Jim Zwerg even stated after a brutal beating, "we're willing to accept death [for their cause]."
From this film, the concept of dedication, and sacrifice are key to the movement of that time. They gave up their normal lives to participate in one of the biggest movements in American history. The film shows great examples of the blacks going through beatings, and facing the possibility of death, yet they still stayed true to their cause. They did not give up, and they kept going. This can be applied to any movement today or throughout history. And this application is used throughout the word today, in places like Africa and Southeast Asia.
(Some info was taken from: http://en.wikipedia.org/wiki/Ben_West)