John Calvin on Romans 14:20-21

20. All things are indeed pure, etc. By saying, that all things are pure, he makes a general declaration; and by adding, that it is evil for man to eat with offense, he makes an exception; as though he had said, — “Meat is indeed good, but to give offense is bad.” Now meat has been given to us, that we may eat it, provided love be observed: he then pollutes the use of pure meat, who by it violates love. Hence he concludes, that it is good to abstain from all things which tend to give offense to our brethren.

He mentions three things in order, to fall, to stumble, to be weakened: the meaning seems to be this, — “Let no cause of falling, no, nor of stumbling, no, nor of weakening, be given to the brethren.” For to be weakened is less than to stumble, and to stumble is less than to fall. He may be said to be weakened whose conscience wavers with doubt, — to stumble when the conscience is disturbed by some greater perplexity, and to fall when the individual is in a manner alienated from his attention to religion. What is said here proves what is stated in a note on Romans 14:13; that is, that σκάνδαλον is a less evil than πρόσκομμα, only that the idea of stumbling, instead of hindrance or impediment, is given here to the former word. The Apostle still adopts, as it were, the ascending scale. He first mentions the most obvious effect, the actual fall, the extreme evil, and then the next to it, the obstacle in the way; and, in the third place, the weakening of the faith of the individual. The real order of the process is the reverse, — the weakening, then the impediment, and, lastly, the stumblingblock which occasions the fall. — Ed.

Romans 14:22-23

22. Hast thou faith? have it to thyself before God. Happy is he that condemneth not himself in that thing which he alloweth.

22. Tu fidem habes? apud teipsum habe coram Deo. Beatus qui non judicat seipsum in eo quod examinat.

23. And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.

23. Qui verb dijudicat si comederit condemnatus est; quia non ex fide: quicquid vero non est ex fide, peccatum est.