1 Corinthians 8:12

12 When you sin against them in this way and wound their weak conscience, you sin against Christ.

Read 1 Corinthians 8:12 Using Other Translations

But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ.
Thus, sinning against your brothers and wounding their conscience when it is weak, you sin against Christ.
And when you sin against other believers by encouraging them to do something they believe is wrong, you are sinning against Christ.

What does 1 Corinthians 8:12 mean?

John Gill's Exposition of the Bible
1 Corinthians 8:12

But when ye sin so against the brethren
Through sitting at meat in an idol's temple, and thereby violating the new commandment of love; by which saints are obliged to love one another as brethren, and take care to do nothing that may hurt and prejudice one another's peace and comfort, it being an incumbent duty upon them by love to serve one another: and

wound their weak conscience:
as before observed: it is contrary to the law of love to wound a brother; it is an aggravation of the sin to wound a weak one; what greater cruelty than to strike or beat, as the word here used signifies, a sick and infirm man? and greater still to strike and wound his conscience than any part of his body; for a wounded spirit is insupportable without divine aid and influence; and what serves most to enhance the crime and guilt is,

ye sin against Christ,
who has so loved this weak brother as to die for him; and between whom there is so close an union, as between head and members; and from whence such a sympathy arises, that what is done to or against such a person, Christ takes as done to himself. The Syriac version emphatically adds, (wh) , "himself".

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