John writes:

Everyone who believes that Jesus is the Christ is born of God, and everyone who loves the father loves his child as well.  (1 John 5:1)

But is that really true?   Everyone who believes Jesus is the Christ is born again?  It is true, if you understand what John means by belief.  There is belief, and then there is belief.

You discover you have a cancerous tumor and go looking for a surgeon.  Turns out your neighbor’s brother is a surgeon.  Do you believe it?  Sure.  But do you decide to lie down on the operating table, undergo full anesthesia and let your neighbor’s brother open you up and cut a few things out?   Not necessarily.  But if you do, then you believe in your neighbor’s brother in a way similar to what John means by believing Jesus is the Christ.

Real belief shows.  It changes a person’s outlook and behavior, so that, instead of following the group-think of the world, he or she gets in step with God’s design and commands.  John calls that “overcoming the world,” and that is a good description of what it feels like to resist the pull of what most people do and choose to do what seems foolish by their standards.

This is how we know that we love the children of God: by loving God and carrying out his commands. This is love for God: to obey his commands. And his commands are not burdensome, for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith.  Who is it that overcomes the world? Only he who believes that Jesus is the Son of God.  (1 John 5:2-5)

Which all fits, which all makes sense – provided you believe.