Indeed, all matters are clean to the clean, but to those who are defiled and unbelieving no matter is clean, but both their mind and conscience are defiled.
However, not all have this knowledge. But some, being aware of the idol, until now eat it as having been offered to an idol, so their conscience, being weak, is defiled.
For if anyone sees you who have knowledge eating in an idol’s place, shall not his conscience, if he is weak, be built up to eat food offered to idols?