Philarete, Metropolitan of St. Petersburgh
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The Eastern church differs from the Roman in making the Holy Spirit proceed from the Father alone, and in denying purgatory, for which it does not find a satisfactory authority in the bible. It admits the same number of sacraments as do the Roman, but holds that baptism should be performed by immersing the whole body three times in water.
see more - Religion - The Greek Church
Sears, Robert. An Illustrated Description of the Russian Empire. New York: Robert Sears, 1855