Sermon «Our Glorious Opportunity» was delivered by the Messenger Mark L. Prophet on Friday, September 27, 1969, during the “S.U.N. Conference”, at Detroit, Michigan. It was initially published as the 1st lecture on 2-audiotape album “Sermons for a Sabbath Evening #9” and recently on the MP3 CD Album “Sermons for a Sabbath Evening #4”.