The discourse of catechesis is necessary for those who preside over “the mystery of piety” [(1 Timothy 3:16)], so that the Church may be increased by the “addition of those being saved” [(Acts 2:47)], while “the word of faith in accordance with teaching” [(Titus 1:9)] is brought to the hearing of unbelievers. Indeed the same manner of teaching will not be suitable for all who approach the word, but the catechesis must also be made to suit the differences of religions, looking to the same aim of the discourse, but not using proofs in the same manner for each. For the Judaizer has presupposed one set of suppositions and the one living in Hellenism different ones..., and the remaining catalogue of those erring in heresies, each presupposing their own suppositions, make it necessary to do battle with their conjectures. For the manner of healing must be suited to the form of the illness. You will not heal the Greek’s polytheism and the Jew’s unbelief regarding “the only-begotten God” [(John 1:18)] with the same [arguments], nor for those who have erred in heresies will you overthrow the delusions about [their] teachings’ made-up myths from the same [arguments].... But it is necessary, as has been said, to look to men’s presuppositions, and for the discussion to be made according to the error in which each is involved, putting forward certain principles and reasonable propositions for each dialogue, so that through the things admitted by both sides the truth may be unveiled in order.
Gregory of Nyssa, Catechetical Discourse: A Handbook for Catechists, ed. John Behr, trans. Ignatius Green, vol. 60, Popular Patristics Series (Yonkers, NY: St Vladimir’s Seminary Press, 2019), 60–61.