The "Sanctus," with a text joining the Old and New Testaments (Isaiah 6:3 and John 12:13), is a beautiful and jubilant reminder of the heavenly presence of our liturgical celebrations. This week we continue our series on the "Ordinary of the Mass" by diving into the spiritual ramifications of the "Sanctus" text, as well as by looking at two musical settings of it: the Sanctus from the Missa Orbis Factor, and the English setting by Sir James MacMillan from his St. Anne's Mass (1985, rev. 2011).