37 But shun thou every diabolical operation, and believe not the apostate Serpent, whose transformation from a good nature was of his own free choice: who can over-persuade the willing, but can compel no one. Also give heed neither to observations of the stars nor auguries, nor omens, nor to the fabulous divinations of the Greeks. Witchcraft, and enchantment, and the wicked practices of necromancy, admit not even to a hearing. From every kind of intemperance stand aloof, giving yourself neither to gluttony nor licentiousness, rising superior to all covetousness and usury.
Neither venture yourself at heathen assemblies for public spectacles, nor ever use amulets in sicknesses; shun also all the vulgarity of tavern-haunting. Fall not away either into the sect of the Samaritans, or into Judaism: for Jesus Christ henceforth has ransomed you. Stand aloof from all observance of Sabbaths, and from calling any indifferent meats common or unclean. But especially abhor all the assemblies of wicked heretics; and in every way make your own soul safe, by fastings, prayers, almsgivings, and reading the oracles of God; that having lived the rest of your life in the flesh in soberness and godly doctrine, you may enjoy the one salvation which flows from Baptism; and thus enrolled in the armies of heaven by God and the Father, may also be deemed worthy of the heavenly crowns, in Christ Jesus our Lord, to Whom be the glory for ever and ever.
Amen.
Source: Catechetical Lectures (New Advent)