The concluding statement of Romans 14:23, namely that whatever does not proceed from faith is sin
again confirms that in the preceding verses (and in particular Romans 14:20) the issue at hand was that a weak brother or sister would commit sin if he or she ate meat and drank wine. If they do this without faith in God the Creator who gives them these gifts, their eating amounts to a transgression, thereby becoming a stumbling block to them. In reality, all eating and drinking in God’s creation is accompanied by a carefree and joyful thanksgiving. In the absence of such thanksgiving and in cases where one is left with the feeling that you have actually committed a transgression, that eating then becomes a sin.1
23 Mais celui qui a des doutes au sujet de ce qu'il mange est condamné, parce qu'il n'agit pas par conviction. Tout ce qui n'est pas le produit d'une conviction est péché.