From the Canadian Jesuit, Philip Chircop:
Once upon a time there was a man who was against war. He got many people excited about his mission and built a large organization to speak out against the war. Eventually people got tired and gave up on him and the mission. He ended up standing outside the capital with an anti-war poster all alone.
One day, a passerby, noticing the lone protestor, walked up to him and asked him in a chiding voice: “Do you really think you’re going to change the world?”
The man replied: “No, but I hope by showing up, the world will not change me.”