We are people of flesh and blood. Jesus was also a Man of flesh and blood. It was just that flesh and blood that He gave on the cross. It was with that flesh and blood that the bread and wine speaks of at the Communion.
Our physical being is of enormous value. Jesus bought us for a great price and that’s why we are totally His. Not just our spirit and soul, but certainly also our bodies, our physical being. It is not without reason that Paul cites this and refers to it when after all, we were bought dearly, quite an urgent and firm call.
Of course, it's not a question whether we are a physical being. The question is, who made us physical beings? The question is about ownership. Do we realize that we – body and all – belong to Jesus?