Jesus had a parable about putting new in old and the improbability of that succeeding which adds context to today’s text.
Paul reminds the disciples that what they are in Christ is vastly different from what they were before Christ entered their lives. The old life is not to be dragged along as a corpse while we walk in Christ; the old life is to be ‘put to death’ as we now live in Jesus:
See what typifies the ‘old’ nature and how incompatible it must be to life in agreement with the LORD? These are two entirely different characters and the writer then draws the line with what is former to what is new:
What is ‘old’ is typified by lies and deception while what is ‘new’ is in the image of Creator Jesus. Such a contrast! Things have changed, priorities are renewed after the heart of God, even the view of others is dynamically turned upside down. The disciples lived in a world of divisions, of them vs. us, free or slave but the ‘newness’ redefines all relationships—not just relationship with the LORD but also all personal relationships. Among the disciples, ALL are in Christ and Christ is all that matters.
This is what should be the true New World Order but it can only be foundationed and functioning in Jesus with each disciple being willingly, faithfully, committedly new in Christ.