“whoever eats, eats for the Lord, since he gives thanks to God; while whoever abstains, abstains for the Lord and gives thanks to God.” (Romans 14:6)
“I know and am convinced in the Lord Jesus that nothing is unclean in itself; still, it is unclean for someone who thinks it unclean.” (Rom 14:14)
“It is not what enters one’s mouth that defiles that person; but what comes out of the mouth is what defiles one.” (Mt 15:11)
“Do we not have the right to eat and drink? Do you not know that those who perform the temple services eat (what) belongs to the temple, and those who minister at the altar share in the sacrificial offerings? I have not used any of these rights, however, nor do I write this that it be done so in my case. I would rather die.” (1 Cor 9:3, 13, 15)
“Although I am free in regard to all, I have made myself a slave to all so as to win over as many as possible. To the Jews I became like a Jew to win over Jews; to those under the law I became like one under the law–though I myself am not under the law–to win over those under the law. To those outside the law I became like one outside the law–though I am not outside God’s law but within the law of Christ–to win over those outside the law. To the weak I became weak, to win over the weak. I have become all things to all, to save at least some. All this I do for the sake of the gospel, so that I too may have a share in it.” (1 Cor 9:19-23)
“Now food will not bring us closer to God. We are no worse off if we do not eat, nor are we better off if we do. But make sure that this liberty of yours in no way becomes a stumbling block to the weak. If someone sees you, with your knowledge, reclining at table in the temple of an idol, may not his conscience too, weak as it is, be “built up” to eat the meat sacrificed to idols? Thus through your knowledge, the weak person is brought to destruction, the brother for whom Christ died. When you sin in this way against your brothers and wound their consciences, weak as they are, you are sinning against Christ. Therefore, if food causes my brother to sin, I will never eat meat again, so that I may not cause my brother to sin.” (1 Cor 8:8-13)