One person considers one day to be better than the rest, while another person considers every day to be just as good. Each person should be fully convinced in their own mind.
But whoever has doubts about something they might eat is guilty if they do eat it. That’s because they don’t believe that they should be eating it, and if you do something even though you don’t believe you should, that’s sin.
But not everyone knows this. Some people are still so accustomed to idols that when they eat sacrificial food, they think of it as having been sacrificed to real gods. And because their conscience is weak, they feel guilty.
I’m convinced, because the Lord Jesus has convinced me of this, that nothing is unclean in itself. But someone may consider a thing to be unclean. If they do, it is unclean for them.