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.
Ver. 7. Unto this hour] Though they have been better taught and clearly convinced, yet they stiffly retain, at least, some tincture of their old odd superstitious conceits. No man's speech, whether he be learned or unlearned (saith Cicero), shall ever persuade me from that opinion which I have taken up from mine ancestors concerning the worship of the immortal gods. (De Nat. Deor. iii.)
Their conscience being weak] That is, not rightly informed of the true nature of things indifferent.
Is defiled] By doing what they doubt of.