He appointed twelve, whom he also named apostles, to be with him, to send them out to preach, and to have authority to drive out demons. (Mark 3:14-15)
What does it mean to live the Christian life? I think we find the answer in these two verses.
We are chosen to be with Jesus.
This doesn’t mean just spending time with God during your quiet time (important as that is) and then living the rest of the day for yourself.
It means being with Jesus every moment of every day. It means walking with him, constantly listening for his voice, and following his lead. (John 15:4-5)
But we aren’t just chosen to be with Jesus. He sends us out into the world to do spiritual battle. (Ephesians 6:11-12, 2 Corinthians 10:3-5)
Oh, we may not be driving out demons. But we are called to do battle against Satan and his kingdom. And we mainly do that by sharing the gospel with those around us.
For it is through the gospel that the gates of hell are torn down and people are set free from Satan’s kingdom.
That’s the Christian life: to be with Jesus and to touch others with his gospel.
And as we do so, I believe Jesus looks at us, smiles, and says,
Who are my mother and my brothers?…
Here are my mother and my brothers! Whoever does the will of God is my brother and sister and mother.” (Mark 3:33-35)
Moment to Moment (Bible blog) 