7 Dear friends, let us love one another, for love comes from God. Everyone who loves has been born of God and knows God. 8 Whoever does not love does not know God, because God is love. (1 John 4:7-8)
Love is what John has on his mind. N.T. Wright expands on this passage:
The vital connection of thought here goes like this. John has just stressed that Jesus, the Messiah, has indeed come in the flesh, and that to deny that is to reveal oneself as a false prophet. But this is no mere dogmatic shibboleth, a meaningless formula which people have to learn in order to pass some arbitrary doctrinal test. It is a symptom of what Christianity is all about. The Christian faith grows directly out of, and must directly express, the belief that in Jesus the Messiah the one true God has revealed himself to be—love incarnate. And those who hold this faith, and embrace it as the means of their own hope and life, must themselves reveal the self-same fact before the watching world. Love incarnate must be the badge that the Christian community wears, the sign not only of who they are but of who their God is.
Wright, T. (2011). Early Christian Letters for Everyone: James, Peter, John and Judah (p. 158). London; Louisville, KY: SPCK; Westminster John Knox Press.
Where this world needs to see love is in the Body of Christ. We are to embody what Christ lived out. This is the best vehicle for this demonstration. Let us realize our failures, repent, and call on the mercy of God to move forward to show this world a better way.