How does a baptized person separate himself from full incorporation in the Mystical Body? A baptized person separates himself from full incorporation in the Mystical Body by open and deliberate heresy, apostasy or schism.
How does a baptized person separate himself from full incorporation in the Mystical Body by heresy? A baptized person separates himself from full incorporation in the Mystical Body by heresy when he openly rejects or doubts some doctrine proposed by the Catholic Church as a truth of divine-Catholic faith, though still professing himself a Christian.