St. Raphael of Brooklyn 1860-1915
I further direct that Orthodox Christians should not make it a practice to attend the services of other religious bodies, so that there be no confusion concerning the teaching or doctrines. Instead, I order that the head of each household, or a member, may read the special prayers which can be found in the Hours in the Holy Orthodox Service Book, and such other devotional books as have been set forth by the authority of the Holy Orthodox Church. (Letter on the Anglicans)