“Protestantism? It is the loyal child of Papism. It went from one heresy to another over the centuries because of its rationalistic scholasticism, and it is continually drowning in the various poisons of its heretical errors. In addition, Papal haughtiness and ‘infallible’ foolishness reign absolutely within it, ruining the souls of its faithful. First of all each Protestant is an independent pope when it comes to matters of faith. This always leads from one spiritual death to another; and there is no end to this ‘dying’ since a person can suffer countless spiritual deaths (in a lifetime).
Since this is the way things are, there is no way out of this impasse for the Papist-Protestantic Ecumenism with its pseudo-Church and its pseudo-Christianity without wholehearted repentance before the God-man Christ and His Orthodox Catholic Church. Repentance is the remedy for every sin, the medicine given to man by the only Friend of man (Christ).”
St. Justin Popovich, Orthodox Faith & Life in Christ, “Humanistic Ecumenism”