As a witness for Peace, our role was to witness in two senses of the word: we SAW, and by our presence we offered affirmation by word or example of a solidarity based on love and faith and the Good News. The word that is much used is "accompaniment." Our contribution was less in our doing than our being-with.
You do not have to be in some setting hallowed by greatness, or in the presence of an artist honored around the world, for art to move you. Art can work its magic any time you are in the presence of a work created by someone who has gone inside the act of creation to become what they are creating. When this takes place, time stands still, and if our hearts are open to this experience, our spirits soar and our imaginations are unfettered.