A good word here from Michael Kelley:
To the kid who is afraid of being the left out, the gospel says, “You’re in.” And you’re never going to be left out.
We are, as Paul said, sealed into the family of God with the promise of the Holy Spirit:
“When you heard the message of truth, the gospel of your salvation, and when you believed in Him, you were also sealed with the promised Holy Spirit. He is the down payment of our inheritance, for the redemption of the possession, to the praise of His glory” (Ephesians 1:13-14).
The gospel tells us that we aren’t going to be left out. The fear of “missing something” is abated with the knowledge that God has given us everything. And now, knowing that we are once and for all on the inside – inside the family; inside the promises; inside the dearly loved prized possession of God Himself – frees us from that nagging sensations that we might be left out.
So to
all those adults with the kid still inside who stood either stood at the edge of the crowd or constantly pushed their way into it, the gospel says, “You’re in. And you belong.”