In the chapters of the Introduction which touch on S. Cyril’s doctrines of Baptism, Chrism, and the Holy Eucharist, I have not attempted either to criticise or to defend his teaching, but simply to give as faithful a representation as I could of his actual meaning.  The Eastern Church had long before S. Cyril’s day, and still has its own peculiar Sacramental doctrines, which, notwithstanding the efforts of rival theologians, can never be reduced to exact conformity with the tenets of our own or other Western Churches.