What Is the Mystery of Christ? Lessons from Colossians 4

Colossians 4 can look like a list of travel updates and greetings at first glance. But slow down, and you will find some of the most important theological and practical truths in all of Paul's letters. From the mystery of Christ to how we speak to those outside the faith, this chapter carries the heart of Paul's mission and some real lessons about how we read Scripture.

What Did Paul Mean by "The Mystery of Christ"?

In Colossians 4:2-4, Paul writes:

"Continue steadfastly in prayer, being watchful in it with thanksgiving. At the same time, pray also for us, that God may open to us a door for the word, to declare the mystery of Christ, on account of which I am in prison, that I may make it clear, which is how I ought to speak." - Colossians 4:2-4 English Standard Version (ESV)

Paul is in prison specifically because of the mystery of Christ. His chains are tied directly to his message, not to a general religious dispute. And notice what he does not ask for. He does not ask for release. He does not ask for comfort. He asks for an open door and clear speech.

Why Is the Inclusion of the Gentiles Called a Mystery?

Paul uses the word "mystery" more than any other New Testament writer. Twenty-one of the twenty-seven New Testament references to mystery come from Paul. And this mystery is not about a future event. It is about God's decisive action in Christ, here and now. The core of it is this: Christ in you, the hope of glory.

For a Jewish person, this was genuinely shocking. A Jewish Messiah for Israel would have been expected. But a plan to restore the Gentiles, those who had been disinherited at Babel as described in Deuteronomy 32, through that same Jewish Messiah? That is the mystery.

How Does the Old Testament Frame This Mystery?

The biblical storyline moves through three major rebellions before Abraham ever appears. First, the fall in the Garden. Second, the rebellion in Genesis 6, where the sons of God cohabitated with human women. Third, the rebellion at Babel, where God scattered the nations and assigned them to other spiritual rulers who were supposed to lead them back to the God of Israel but instead accepted worship for themselves.

Abraham does not appear until after all three of these events. And immediately after Babel, God makes a covenant that includes the nations. As Genesis 12:3 says:

"...and in you all the families of the earth shall be blessed." - Genesis 12:3 English Standard Version (ESV)

The cross is the answer to how the Gentiles come home. Paul writes in 1 Corinthians that the rulers of this world did not understand this. If they had grasped that the Jewish Messiah's arrival would nullify their authority and bring the Gentiles back to God, they would not have crucified Him. That is the mystery. And that is why Paul is in prison. He is announcing that the pathway is now open, and there is real opposition to it, both human and supernatural.

What Does It Mean to Walk in Wisdom Toward Outsiders?

Colossians 4:5 calls believers to walk in wisdom toward outsiders, making the best use of the time. This verse is often preached as a call to better time management. But that misses the point entirely. Paul has urgency for the mission in view. The time is short. Jesus has come, and He is coming again. For those who do not know Him, time will eventually run out. That reality should shape how we engage with people around us.

How Should Christians Speak to Those Outside the Faith?

Nowhere in Scripture do you find the followers of Jesus screaming at outsiders. Paul reasoned with people in Athens. He challenged fellow Jews because he was a Pharisee and could do so. But he did not approach Romans or Gentiles with condemnation as his opening move.

Colossians 4:6 says:

"Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer each person." - Colossians 4:6 English Standard Version (ESV)

What Does "Seasoned with Salt" Actually Mean?

This phrase is commonly misread as a warning against crude language. But that is not what it means. In the ancient world, salt carried several meanings. It was a preservative, a purifying agent, a seasoning, and a symbol of covenant loyalty. Sharing salt at a table implied a debt of loyalty. Salt also brought death when used in excess. Victorious armies would salt the land of a defeated enemy to make it permanently barren.

The point Paul is making is about gracious, purposeful, life-giving speech that is shaped by wisdom and by the character of Christ. And notice the end of the verse: "so that you may know how you ought to answer each person." Each person is different. The way you speak to one person may not be the right approach for another. Effective witness requires paying attention to who is in front of you.

One practical approach worth considering: rather than making declarations that cause people to dig in defensively, ask a question or make a statement and then stop. Let it sit. Plant the seed and give the Holy Spirit room to work.

What Can We Learn from Paul's Companions in Colossians 4?

The list of names in Colossians 4 is easy to skim past. But these people carry real lessons.

Is Failure the End of the Road? The Story of Mark

John Mark walked away from Paul's first missionary journey in Pamphylia. Paul refused to take him on the second journey. There were twelve years of silence in the New Testament record about Mark. Then in Colossians 4:10, Paul sends greetings and tells the church to welcome Mark if he comes. The rift is healed. By 2 Timothy 4:11, Paul writes:

"...Get Mark and bring him with you, for he is very useful to me for ministry." - 2 Timothy 4:11 English Standard Version (ESV)

Mark likely wrote the Gospel bearing his name. Failure was not the end of his road. God did not look at Mark's desertion and say, "We are done with you." He had a future for him. That is worth sitting with. Is there someone in your circle who needs to be welcomed back? Or are you the one who needs to come back?

What Happened to Demas?

Demas is mentioned warmly in Colossians 4. But by 2 Timothy 4:10, Paul writes that Demas, "in love with this present world, has deserted me and gone to Thessalonica." Some departures in Paul's ministry were assignments. Demas was a desertion. The contrast between Mark and Demas is striking. Both received greetings from Paul. One returned. One did not. The same grace was extended to both.

Was Nympha a Female Church Leader?

Colossians 4:15 mentions a church meeting in the house of either Nympha or Nymphas, depending on how the Greek accent is read. The oldest manuscripts were written entirely in capital letters, which means accent marks were not included. The pronouns in existing manuscripts are split almost evenly between "his," "hers," and "their." We simply do not know with certainty whether this was a man or a woman.

If someone wants to use this passage to argue for women in ministry, the honest answer is that this text cannot carry that argument. It is genuinely ambiguous. It is better to acknowledge that uncertainty than to overstate what the text says. Build your case from clearer material and be honest about what you do not know.

Does the Lost Letter to Laodicea Undermine Biblical Inspiration?

Colossians 4:16 references a letter connected to Laodicea that we do not have in the New Testament. Some say it was a lost letter from Paul. Others suggest it may be the letter we know as Ephesians. We do not know who wrote it, how it was lost, or what it contained.

But does a missing letter threaten the doctrine of inspiration? No. Inspiration is a providential process, not a paranormal one. Not everything Paul ever wrote was intended by God to be part of the canon. He may have written thank-you letters. He may have written personal notes. Just because something came from Paul's hand does not automatically make it sacred Scripture. If God intended it to be in the Bible, it would be there. What is in the canon is there because God providentially preserved it.

Did Paul Actually Write His Own Letters?

Paul closes Colossians with a personal note in 4:18:

"I, Paul, write this greeting with my own hand. Remember my chains. Grace be with you." - Colossians 4:18 English Standard Version (ESV)

Paul dictated most of his letters to trained scribes. This was common practice in the ancient world. Greek is a complex language with no punctuation, no apostrophes, and grammatical meaning embedded in word endings. Dictating to a scribe allowed Paul to think and speak without slowing down to manage the mechanics of writing. The scribe handled the page while Paul's mind moved freely.

Dictating did not mean Paul was uneducated. He was a Pharisee of Pharisees, fluent in Hebrew, Aramaic, Greek, and likely Latin. Even Josephus, the Jewish historian, admitted he needed help writing Greek well enough for his historical works. Paul's use of a scribe reflects the normal practice of a highly educated person in the ancient world, not a limitation.

Life Application

Colossians 4 closes with a challenge that is easy to miss because it is wrapped in names and logistics. But the heart of it is this: the mystery of Christ, the inclusion of all people in the family of God through Jesus, is worth everything. Paul gave his freedom for it. His companions gave their comfort and their plans for it. And some, like Mark, had to find their way back to it after failure.

This week, consider one specific person outside the faith in your life. Pray for an open door, as Paul did. Then think carefully about how to speak to that person in a way that fits who they are. Not a script. Not a confrontation. A gracious, thoughtful, salt-seasoned word that plants something and leaves room for God to work.

Ask yourself:

• Am I praying for open doors to share the Gospel, or am I only praying for my own comfort and circumstances?
• Is there someone I have written off, as Paul initially wrote off Mark, who needs to be welcomed back?
• Am I adjusting how I speak about faith based on who I am speaking to, or am I using the same approach with everyone regardless of whether it is effective?
• Is there an area of my life where I have walked away, like Demas, and need to return?