Romans 14:23

And he that doubteth
Or makes a difference between meats and meats, or is in suspense whether any difference should be observed or not,

is damned;
not with everlasting damnation, which is not the consequent of, nor connected with such an action, as eating of a thing indifferent, with a scrupulous conscience; but such an one is condemned in his own conscience; he is self-condemned, his conscience condemns him for what he himself does; and he is self-condemned in judging and censuring others, for the same things: so the Syriac renders it, (hl byyxta) , "he becomes guilty", or he contracts guilt to himself, or is self-condemned; and so the Arabic, "he is already condemned",

because [he eateth] not of faith:
or of a full persuasion in his own mind that he is right in eating; he halts between two opinions, and is doubtful in his own mind what is best to do, and therefore, whilst this is his case, he ought to refrain:

for whatsoever is not of faith is sin.
This is a general rule, or axiom, which is not only applicable to the present case, but to any other, whether of a natural, civil, moral, or evangelic kind: "whatsoever does not spring from faith", as the Arabic version renders it, cannot be excused of sin; whatever is not agreeable to the word and doctrine of faith, ought not to be done; whatever is done without faith, or not in the exercise of it, is culpable, for without faith nothing can be pleasing to God; and whatever is contrary to the persuasion of a man's own mind, is so far criminal, as it is a violation of his conscience; whatever men do, especially in a religious way, they ought to make faith of it, or to be fully persuaded of it in their own minds, or they act amiss: in the Arabic version, the Complutensian edition, the Alexandrian copy, and some others, ( Romans 16:25-27 ) , "now to him that is of power" are here added; which have induced some to think, that the apostle intended to have finished his epistle here; but having more time, and other things occurred to write of, he proceeded.