I highly doubt, when Mohamed Bouazizi lit himself on fire December 17th, 2010, that he thought "this will hopefully spark a democratic revolution in Tunisia." Furthermore, I doubt he thought "and that Tunisian revolution will spread to Egypt, Libya, Yemen, Iran, Algeria, Cameroon, Jordan, Syria, and Bahrain."
But it did. You never know what your one brave little act could accomplish, until after you perform that act. Would that we all could be so brave, so reckless.
A lighthearted version of this, h/t Chris.