Theophylact of Ohrid — on Rom 14:10 (Commentary on Romans)

“You, the non-eater, why do you condemn your brother who eats, as lacking self-control, because he eats? He is your brother; you must not despise your own member. Will you give an answer for him? He himself will stand before the judgment and will bear the punishment himself. Do you see how, in addressing the mature one, he strikes fear into the very one who Judaizes, as one who must give an account at the dreadful judgment?”