We in this country, in this generation, are by destiny rather than choice the watchmen on the walls of world freedom. We ask therefore, that we may be worthy of our power and responsibility, that we may exercise our strength with wisdom and restraint, and that we may achieve in our time and for all time the ancient vision of peace on earth, goodwill toward men.

—John F. Kennedy (from a speech that was never delivered, due to Kennedy's death)