The Sources of Orthodox Doctrine .
The words "Doctrine" and "Heresy" and "Anathema" are all linked together. The Protestants / Evangelicals / Anabaptists all have different beliefs on this to the Orthodox and Catholics, and the Catholics and the Orthodox believe similar things but deny each other as the authority base.
1) Doctrine - a definite teaching revealed by the Holy Spirit from scripture, in a personal relationship with God with the believer, (to be distinguished from a persuasion - that is convinced in their mind to different percentages, but as yet unconfirmed in their relationship with God).
2) Heresy - a serious contradiction of new covenant law, or that which is revealed in new covenant scripture.
3) Anathema - the curse of God, used by God. under only his decision making.
The Bible and the Holy Spirit.
1) Doctrine - a definite teaching revealed through "Holy Catholic Apostolic Faith" bishops, in Creeds, (creed canons) and Ecumenical councils. note: they claim these councils and bishops are guided by the Holy Spirit.
2) Heresy - contradicting the said bogus bishops, and Titular Head of their Church.
3) Anathema - the curse of God put upon people via pseudo-Christianized voodoo ceremonies.
important note: in Galatians 1: 6-9 God declares the clergy of the Eastern Orthodox and Roman Catholic religions "anathema" or under his curse, for preaching another gospel, by adding works and priestcraft (and a whole avalanche of other things), into salvation, which is in reality in Christ alone.
ORTHODOX SOURCE 1 : CREEDS :