Though I speak with the tongues of men and of angels, but have not love, I have become sounding brass or a clanging cymbal. I Corinthians 13:1
Being a drummer for most of my life I have an ear for others who play and when they are off beat I know it. When a child or someone who doesn't play begins to bang on a cymbal, immediately, everyone knows it, because of the awful noise it produces. So it is in the body of Christ, when someone doesn't have the love of God in Him everyone knows it because those who love are known by their fruit!
True agape love is unmistakable in a person's life because it is God's kind of love. Many claim to love you but fall short when it costs them something, in other words, love has a list of attributes that stands out among the impostors, exposing their attempt at love, being of the flesh. In order for one to exhibit God's love he has to lay down his life just as Jesus did for us by being crucified for a people to whom the punishment was due. Love involves action because when we love we have to display the fruit of true agape love that involves patience and kindness and sometimes it becomes very hard to actually love someone.
When I was first saved and attended church, many times they would ask everyone to take hold of the person's hand next to you and face to face sing: "I love you with the love of the Lord." That made everyone but the phonies want to run for cover, knowing that the person you were singing to didn't love you and likewise you didn't love them, and maybe didn't even know them. That is why the world doesn't want anything to do with the church, because for the most part their love for humanity is only skin deep, being only cheap talk!
And though I bestow all my goods to feed the poor, and though I give my body to be burned, but have not love, it profits me nothing. I Corinthians 13:3
Your servant in Christ, Tim Laughlin