We Ought to Love Each Other - 1 John 4 11, 12

11Dear friends, since God so loved us, we also ought to love one another. 12No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us.

Jesus is an example of God's love for us, but this love is made complete by us loving each other. By not loving someone else, you are a barrier to them receiving God's love. By loving someone else you act as a conduit for God's love. You enable God's love to reach them.