1 Corinthians 8:7

Though some of you know that there is but one living and true God, and that an idol is nothing in the world, and meat is neither sanctified nor polluted by being set before it; yet every one doth not know so much: and though the gospel have been a long time preached amongst them, yet to this day they may have some superstitions opinion of the idol, and then their conscience will be defiled or polluted. It is much the same case at this day as to the business of image worship, or veneration of images, and invocation of saints, amongst the papists. The wisest and most knowing of them will declaim against giving Divine adoration to the image, or to the saint, and tell us that they worship the true and living God upon the sight of the image only, and make use of the name of the saint only to desire him, or her, to pray to God for them. Now not to meddle with that question: Whether in our worshipping the true God, it be lawful to set a creature before us as our motive or incitement to worship, or use any Mediator but Christ? Yet the things are unlawful, upon the same account that the apostle here determines it unlawful for stronger Christians to eat meat offered to idols, though they knew and professed that an idol was nothing; for all people that come so to worship have not that knowledge; there are, without doubt, multitudes of simple people amongst the papists, that, plainly, in this kind of veneration and adoration venerate and adore the creature; and so their consciences are defiled by idolatry, because they have not such knowledge as others have, supposing that what those others did were lawful as to their practice, which indeed it is not.