Whoever loves God must also love his brother

1 John 4:19-5:3
He has given us this command: Whoever loves God must also love his brother.
By loving God and carrying out his commands.
This is love for God: to obey his commands.
Love and obedience are bound up together.
Faith is what brings us into God's family. To love God is to share God's nature and to love others. Love for God makes obedience natural, not burdensome.
Why?
We can not see the God, but we can see our brothers, if we can not love brothers, how can we love the unseen God. It will be a liar.
Faith bring us into God's family, into the church. To love god is to share God's love, God's nature to others so we have to love others for God has loved us.
How?
Trust in the reality love one another, do not talk about the virtual matter. Show the love to others.