When we participate in the Lord’s supper and have communal meals together, we’re not involved in empty rituals. We remember the ultimate sacrifice Christ has done for us on the cross, so we do it by faith. Not only that, but we also have fellowship with the members of the church because we have all been united in Christ. Similarly, when pagans celebrate their festivals with communal meals, they have fellowship with their pagan gods. This passage teaches us that if we partake in such pagan communal meals, we’re committing idolatry.