Grace Lee Boggs: [we tried to] explain that a rebellion is righteous, because it's the protest by a people against injustice, because of unrighteous situation, but it's not enough. You have to go beyond rebellion. And it was amazing, a turning point in my life, because until that time, I had not made a distinction between a rebellion and revolution. And it forced us to begin thinking, what does a revolution mean? How does it relate to evolution? (in an interview with Bill Moyers (2007)