Romans 14:21

It is good neither to eat flesh, etc. - The spirit and self-denying principles of the Gospel teach us, that we should not only avoid every thing in eating or drinking which may be an occasion of offense or apostasy to our brethren, but even to lay down our lives for them should it be necessary.

Whereby thy brother stumbleth - Προσκοπτει , from προς , against, and κοπτω , to strike, to hit the foot against a stone in walking, so as to halt, and be impeded in one's journey. It here means, spiritually, any thing by which a man is so perplexed in his mind as to be prevented from making due progress in the Divine life. Any thing by which he is caused to halt, to be undecisive, and undetermined; and under such an influence no man has ever yet grown in grace and in the knowledge of Jesus Christ.

Or is offended - Η σκανδαλιζεται , from σκανδαλον , a stumbling-block; any thing by which a person is caused to fall, especially into a snare, trap, or gin. Originally the word signified the piece of wood or key in a trap, which being trodden on caused the animal to fall into a pit, or the trap to close upon him. In the New Testament it generally refers to total apostasy from the Christian religion; and this appears to be its meaning in this place.

Or is made weak - Η ασθενει , from α , negative, and σθενος , strength; without mental vigor; without power sufficiently to distinguish between right and wrong, good and evil, lawful and unlawful. To get under the dominion of an erroneous conscience, so as to judge that to be evil or unlawful which is not so. The two last terms are omitted by two excellent MSS. (the Codex Alexandrinus and the Codex Ephraim), by the Syriac of Erpen, the Coptic and the Ethiopic, and by some of the primitive fathers. It is very likely that they were added by some early hand by way of illustration. Griesbach has left them in the text with a note of doubtfulness.