Wherefore those Our Predecessors have, with Apostolic fortitude continually resisted the machinations of those evil men, who, 'foaming out their own confusion, like the raging waves of the sea,' and 'promising liberty, while they are themselves the slaves of corruption,' endeavored by their fallacious opinions and most wicked writings to And those Our Predecessors, who were the assertors and Champions of the august Catholic Religion, of truth and justice, being as they were chiefly solicitous for the salvation of souls, held nothing to be of so great importance as the duty of exposing and condemning, in their most wise Letters and Constitutions, all heresies and errors which are hostile to moral honesty and to the eternal salvation of mankind, and which have frequently stirred up terrible commotions and have damaged both the Christian and civil commonwealths in a disastrous manner. It is well known unto all men, and especially to You, Venerable Brothers, with what great care and pastoral vigilance Our Predecessors, the Roman Pontiffs, have discharged the Office entrusted by Christ Our Lord to them, in the Person of the Most Blessed Peter, Prince of the Apostles, have unremittingly discharged the duty of feeding the lambs and the sheep, and have diligently nourished the Lord's entire flock with the words of faith, imbued it with salutary doctrine, and guarded it from poisoned pastures.

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