Romans 14:23 : But he that doubteth is condemned if he eat, because he eateth not of faith; and whatsoever is not of faith is sin. Believing a thing is right does not make it right; but doing a wrong thing, believing it is right, shows honesty of purpose. Saul of Tarsus thought he was doing right in persecuting Christians; he was true to what he believed was right--that commended him to God. He was a sinner, but an honest sinner. The Jew who believed it wrong to eat certain meat, and yet ate the meat rather than to be called odd or foolish, sinned against himself and against God. If a man even has a doubt about the rightfulness of a certain thing, he should not engage in it. He is con-demned if he does a doubtful thing. A man cannot go against his idea of right without great injury to his character. "He eateth not of faith," means that he did not fully believe that such eating was right. And that principle holds good concerning any practice about which we have doubts. "Whatsoever is not of faith is sin." This does not refer to faith in Christ or the gospel; but to faith in the righteousness of what we do. If a Christian does a thing without being fully persuaded that it is right, he sins. A man may sin believing he is doing right; but he sins in doing anything, if he doubts that it is right. If he doubts, the act is not of faith. There is this truth about the whole matter of eating meat and observing days: If the Christian Jews had had an undivided faith in Christ instead of dividing it between Moses and Christ, between the law and the gospel, they would have known that all things centered in Christ, and that the regulations about meats and days was no part of the gospel.