7 Howbeit there is not in every man that knowledge: for some with conscience of the idol unto this hour eat it as a thing offered unto an idol; and their conscience being weak is defiled.
7 But not everyone possesses this knowledge. Some people are still so accustomed to idols that when they eat sacrificial food they think of it as having been sacrificed to a god, and since their conscience is weak, it is defiled.
7 However, not all possess this knowledge. But some, through former association with idols, eat food as really offered to an idol, and their conscience, being weak, is defiled.
7 In strict logic, then, nothing happened to the meat when it was offered up to an idol. It's just like any other meat. I know that, and you know that. But knowing isn't everything. If it becomes everything, some people end up as know-it-alls who treat others as know-nothings. Real knowledge isn't that insensitive. We need to be sensitive to the fact that we're not all at the same level of understanding in this. Some of you have spent your entire lives eating "idol meat," and are sure that there's something bad in the meat that then becomes something bad inside of you. An imagination and conscience shaped under those conditions isn't going to change overnight.
7 However, there is not in everyone that knowledge; for some, with consciousness of the idol, until now eat it as a thing offered to an idol; and their conscience, being weak, is defiled.
7 However, not all believers know this. Some are accustomed to thinking of idols as being real, so when they eat food that has been offered to idols, they think of it as the worship of real gods, and their weak consciences are violated.
Matthew Henry's Commentary on 1 Corinthians 8:7
Commentary on 1 Corinthians 8:7-13
(Read 1 Corinthians 8:7-13)
Eating one kind of food, and abstaining from another, have nothing in them to recommend a person to God. But the apostle cautions against putting a stumbling-block in the way of the weak; lest they be made bold to eat what was offered to the idol, not as common food, but as a sacrifice, and thereby be guilty of idolatry. He who has the Spirit of Christ in him, will love those whom Christ loved so as to die for them. Injuries done to Christians, are done to Christ; but most of all, the entangling them in guilt: wounding their consciences, is wounding him. We should be very tender of doing any thing that may occasion stumbling to others, though it may be innocent in itself. And if we must not endanger other men's souls, how much should we take care not to destroy our own! Let Christians beware of approaching the brink of evil, or the appearance of it, though many do this in public matters, for which perhaps they plead plausibly. Men cannot thus sin against their brethren, without offending Christ, and endangering their own souls.