Albert Barnes Commentary 1 Corinthians 10:30

"If I partake with thankfulness, why am I evil spoken of for that for which I give thanks?" — 1 Corinthians 10:30 (ASV)

For if I by grace be a partaker. Or rather, "If I partake by grace—if, by the grace and mercy of God, I have a right to partake of this—yet why should I so conduct myself as to expose myself to the reproaches and evil suspicions of others? Why should I lay myself open to be blamed on the subject of eating, when there are so many bounties of Providence for which I may be thankful, and which I may partake of without causing injury, or exposing myself in any way to be blamed?"

Why am I evil spoken of. Why should I pursue such a course as to expose myself to blame or censure?

For that for which I give thanks. For my food. The phrase, "for which I give thanks," seems to be a periphrasis for food, or for that of which he partook to nourish life. It is implied that he always gave thanks for his food; and that this was such a universal custom for him that the phrase, "for which I give thanks," might be used as convenient and appropriate phraseology to denote his ordinary food.

The idea in the verse, then, is this: "By the favour of God, I have a right to partake of this food. But if I did, I would be evil spoken of and cause injury. And it is unnecessary. God has made ample provision elsewhere for my support, for which I may be thankful. I will not therefore expose myself to calumny and reproach, or be the occasion of injury to others by partaking of the food offered in sacrifice to idols."