This is how we know that we love God's children when we love God and obey His commands.
References for 1 John 5:2
For this is what love for God is: to keep His commands. Now His commands are not a burden,
because whatever has been born of God conquers the world. This is the victory that has conquered the world: our faith.
And who is the one who conquers the world but the one who believes that Jesus is the Son of God?