Heresies are systems of Christian thought declared to be wrong by the early church leaders. These systems of thought were valiant efforts to find doorways into the faith that responded to questions and experimental approaches. They are valuable insights into the Christian Faith.

As time goes by a catalogue of heresies will appear along with commentary. Here is a start. 

Marcionism   

Gnosticism

Patripassianism

Modalism

Sabellianism

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