'Union' in the Bible

Or don't you know that all of us who were baptized into union with the Messiah Jesus were baptized into his death?

For the wages of sin is death, but the free gift of God is eternal life in union with the Messiah Jesus our Lord.

Therefore, there is now no condemnation for those who are in union with the Messiah Jesus.

nor anything above, nor anything below, nor anything else in all creation can separate us from the love of God that is ours in union with the Messiah Jesus, our Lord.

As one who lives in union with the Lord Jesus, I know and am certain that in its own nature no food is 'impure'; but if people regard any food as impure, to them it is.