While it stands to reason that Handel’s 'Messiah' -- with its continued circulation and worldwide appreciation -- would go on to refine itself over the centuries, the St. Thomas Choir of Men & Boys and the Concert Royal have yet to falter on their annual tradition: the pillar Christmas mass, a full-length two-and-a-half hour arrangement of 'Messiah', performed for its encore act on December 10th at St. Thomas Church.