Are You In or Are You Out? How to Know If You’re Part of God’s Family
Many Christians grow up singing about being part of the family of God, calling each other brother and sister in the Lord. But what does it actually mean to be in God’s family? And how can you know for sure that you are? These are two of the most important questions any person can ask.
Why Do Christians Call Each Other Brother and Sister?
The reason Christians refer to one another as brother and sister is because there is a relationship that transcends every human connection. It is the bond that comes from being part of God’s family. This is not just a warm tradition. It points to something real and deeply spiritual.
What Does Mark 3:31-35 Teach Us About God’s Family?
In Mark chapter 3, Jesus is surrounded by a crowd when His mother and brothers arrive outside and send word calling for Him. His response is striking. Rather than stepping out to meet them, He looks around at those seated near Him and asks a pointed question.
“Who are my mother and my brothers? Looking around at those who were sitting around him, he said, ‘Here are my mother and my brothers. For whoever does the will of God, this is my brother and my sister and my mother.'” – Mark 3:33-35
Jesus is not dismissing His earthly family. He loved them deeply. He submitted to His parents as a child (Luke 2), He defended honoring parents (Mark 7), and even from the cross He made sure His mother would be cared for. What Jesus is doing here is pointing to something even greater than physical family. He is describing a heavenly one.
Three Groups of People in This Story (Which One Are You?)
The passage presents three distinct groups of people. Each one represents a different kind of relationship with Jesus. The question worth sitting with is: which group best describes you?
Group 1: The Familiar (Outside Looking In)
Jesus’ mother and brothers are standing outside. They believe their connection to Him gives them special access. They are not asking to see Him. They are summoning Him, expecting Him to come to them.
This raises a question many people quietly carry: does being born into a Christian family make you a Christian? Does growing up in church, having parents who prayed over you, or having a relative who is deeply faithful make you part of God’s family?
The answer, according to Jesus, is no. Association with Jesus is good, but it is not enough. You can be familiar with Him without truly knowing Him.
Group 2: The Followers (Inside, But Looking Around)
Inside the room, a crowd is seated around Jesus. They are close. They heard Him teach. They may have witnessed miracles firsthand. Their proximity feels like it should count for something.
But Jesus does not define His family by who is in the room. You can attend church, listen to sermons, read your Bible, serve occasionally, and still not be part of His family. Nearness is not the same as belonging.
Religious activity is valuable. But none of it, on its own, brings you into God’s family. You can follow Jesus from a distance and still not know Him personally.
Group 3: The Family (Looking to Him)
Then Jesus identifies a third group. He looks around at those seated near Him and says, here are my mother and my brothers. What sets this group apart is not where they are sitting. It is how they are living.
“Whoever does the will of God, this is my brother and my sister and my mother.” – Mark 3:35
This group has a family resemblance. Not a physical one, but a spiritual one. Their lives are characterized by obedience to the Father. They look like they belong to Jesus because they do.
Does Obedience Save You?
This is an important distinction. Obedience does not earn your place in God’s family. You are not saved by what you do. You obey because you are saved. The fruit of a genuine faith is a life that increasingly reflects the character of Jesus.
“You will know them by their fruits.” – Matthew 7:16
Jesus made it clear that not everyone who calls Him Lord will enter the kingdom. “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven.” – Matthew 7:21. There will be those who used the right words but never truly surrendered. True belonging to God’s family is demonstrated in how you live, not just what you say.
Is God’s Family Exclusive or Inclusive?
The answer is both, and that is not a contradiction.
It is exclusive because there is only one way into God’s family. Jesus said, “I am the way, and the truth, and the life. No one comes to the Father except through me.” – John 14:6. There is no other path.
But it is also beautifully inclusive. Jesus used the word “whoever.” Whoever does the will of God. Whoever calls on the name of the Lord. That word leaves the door open to anyone.
“But as many as received him, to them he gave the right to become children of God, even to those who believe in His name.” – John 1:12
No matter your past, no matter what you have done, you are not disqualified. Hebrews 2:11 says He is not ashamed to call you His brother or sister. He welcomes you.
How Do You Join God’s Family?
You are not born into this family. You enter it by grace, through faith in Jesus Christ. It begins with a moment of surrender, trusting Jesus as your personal Lord and Savior. And it continues in a lifestyle of following Him.
The psalmist captured the heart of it well: “I delight to do your will, O my God.” – Psalm 40:8. And Jesus Himself said, “My food is to do the will of Him who sent me.” – John 4:34. That is what a life in God’s family looks like.
Life Application
This week, take an honest look at your own life. Not at your church attendance, your family background, or your religious habits, but at the actual direction of your heart. Is your life characterized by a genuine desire to do the will of God? Is there evidence in how you live, how you speak, and how you respond to difficulty that you belong to His family?
If you have never made a personal decision to trust Jesus Christ as your Lord and Savior, that is the most important step you can take. And if you have, let this be a week where you live it out more fully, not to earn anything, but because you belong to Him.
Ask yourself these questions:
- Am I relying on my family background, church attendance, or religious habits as a substitute for a real relationship with Jesus?
- Is there evidence in my daily life that I am doing the will of God, or am I simply nearby without truly surrendering?
- Have I ever had a moment where I personally trusted Jesus Christ as my Lord and Savior?
The invitation is open to whoever will come. The question is simply this: are you in, or are you out?
