In catechetical instruction, heresy in catholic theology serves not merely as an abstract principle but as a lived reality shaping sacramental life, moral formation, and prayer. It safeguards revealed truth while inviting deeper intellectual assent and personal conversion. Ultimately, it contributes to the sanctification of the faithful and the building up of the Mystical Body of Christ. The theological articulation of heresy in catholic theology developed over centuries through the reflection of the Fathers, the decrees of ecumenical councils, and the pastoral life of the Church. It is grounded in Sacred Scripture and transmitted through Sacred Tradition, forming part of the coherent unity of Christian teaching.
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