The words spoken by the leader of the free world can expand the frontiers of freedom or shrink them. When Ronald Reagan called on Gorbachev to 'tear down this wall ' a surge of confidence rose that would ultimately breach the bounds of the evil empire.
Ultimately we have just one moral duty: to reclaim large areas of peace in ourselves more and more peace and to reflect it towards others. And the more peace there is in us the more peace there will be in our troubled world.