Strength of body, strength of will. Both are required. A man's freedom depends on his willingness to act, to rise against those who would place him in chains. Small choices add up, building towards differing outcomes. In the moment, one does not often know the implications of his actions. Inevitably, all is revealed.
There are several "cinematic" links in the story. You will have the option to view multiple events happening simultaneously. While not adding to the branching, they do offer deeper insight into the story.