14:21-23 It is the fine thing neither to eat meat, nor to drink wine, nor to do anything which makes the road more difficult for your brother to walk. As far as you yourselves are concerned you have enough faith to know that these things do not matter--well, then, let that be a matter between yourself and God. Happy is the man who never has cause to condemn himself for doing what he has come to the conclusion it was right to do. But he who has doubts about eating something stands condemned if he does eat it, because his decision to eat is not the result of faith.
We are back at the point that what is right for one man may be the ruin of another. Paul's advice is very practical.
(i) He has advice for the man who is strong in the faith. That man knows that food and drink make no difference. He has grasped the principle of Christian freedom. Well, then, let that freedom be something between him and God. He has reached this stage of faith; and God knows well that he has reached it. But that is no reason why he should flaunt his freedom in the face of the man who has not yet reached it. Many a man has insisted on the rights of his freedom, and then had cause to regret that he ever did so when he sees the consequences.
A man may come to the conclusion that his Christian freedom gives him a perfect right to make a reasonable use of alcohol; and, as far as he is concerned, it may be a perfectly safe pleasure, from which he runs no danger. But it may be that a younger man who admires him is watching him and taking him as an example. And it may also be that this younger man is one of these people to whom alcohol is a fatal thing. Is the older man to use his Christian freedom to go on setting an example which may well be the ruin of his young admirer? Or is he to limit himself, not for his own sake, but for the sake of the one who follows in his footsteps?
Surely conscious limitation for the sake of others is the Christian thing. If a man does not exercise it, he may well find that something that he genuinely thought to be permissible has brought ruin to someone else! It is surely better to make this deliberate limitation than to have the remorse of knowing that what one demanded as a pleasure has become death to someone else. Again and again, in every sphere of life, the Christian is confronted with the fact that he must examine things, not only as they affect himself, but also as they affect other people. A man is always in some sense his brother's keeper, responsible, not only for himself, but for everyone who comes into contact with him. "His friendship did me a mischief," said Burns of the older man he met in Irvine as he learned the art of flax-dressing. God grant that none may say that of us because we misused the glory of Christian freedom!
(ii) Paul has advice for the man who is weak in the faith, the man with the over-scrupulous conscience. This man may disobey or silence his scruples. He may sometimes do something because everyone else is doing it and he does not wish to be different. He may do it because he does not wish to court ridicule or unpopularity. Paul's answer is that if a man defies his conscience he is guilty of sin. If a man believes a thing to be wrong, then, if he does it, for him it is sin. A neutral thing becomes a right thing only when it is done out of the real, reasoned conviction that it is right. No man is the keeper of another man's conscience, and each man's conscience, in things indifferent, must be the arbiter for him of what is right or wrong.
-Barclay's Daily Study Bible (NT)