As for those who believe that they should worship on a certain day of the week, it is to honor the Lord that they worship on that day. And as for those who think that it is all right to eat all kinds of food, it is to honor the Lord that they eat those foods, as is clear from their thanking God for the food that they eat. As for those who abstain from eating certain kinds of food, it is to honor the Lord that they do not eat those foods, and they also thank God for the food that they do eat. So doing either of those things is not wrong in itself.