7 However not all men have this knowledge; but some, being accustomed to the idol until now, eat food as if it were sacrificed to an idol; and their conscience being weak is defiled. 8 But food will not commend us to God; we are neither the worse if we do not eat, nor the better if we do eat. 9 But take care that this liberty of yours does not somehow become a stumbling block to the weak. 10 For if someone sees you, who have knowledge, dining in an idol’s temple, will not his conscience, if he is weak, be strengthened to eat things sacrificed to idols? 11 For through your knowledge he who is weak is ruined, the brother for whose sake Christ died. 12 And so, by sinning against the brethren and wounding their conscience when it is weak, you sin against Christ.13 Therefore, if food causes my brother to stumble, I will never eat meat again, so that I will not cause my brother to stumble.—1 Cor. 8:7-13 NASB
Paul continues his narrative on whether or not we, as Christians, are free to eat meat sacrificed to idols. The point he is making is that when we exercise our liberty in Christ Jesus, we need to be sure that others are not offended or misled by watching us. Though we have the knowledge that we have liberty because Jesus Christ died to set us free from the law and from sin, others do not have that knowledge. They are accustomed to not eating meat sacrificed to idols because that is what the law has taught them. Just as some of the disciples still taught that you had to be circumcised because they did not yet have the understanding of their freedom in Christ. We, being the stronger, should then give up our freedom to do certain things. Not because the action itself is a sin, but because it causes our brother or sister to stumble and we have sinned against them. Any sin against anyone is a sin against Christ. So we should use our knowledge, spoken in love, to edify our brothers and sisters and not to harm them.