Designer clothes are known by their trademarks or designs. You know if it’s a Tommy Hilfiger or a Ralph Lauren. They have trademarks that make them very visible and very identifiable. Those that hold an office of a unique kind can be identified by their attire. You can know a doctor by his attire or a policeman by his attire or a judge by his attire.
God has sent forth something as irrefutable evidence that we are close to God – an irrefutable test by which you can measure your own spiritual growth. In fact, so awesome is this trademark of God that He said it would be the major declaration of your faith. Jesus put it this way. He said, “By this shall all men know that you are my disciples, that you love one another.”
So now I am giving you a new commandment: Love each other. Just as I have loved you, you should love each other. Your love for one another will prove to the world that you are my disciples.” John 13:34-35
Owe nothing to anyone—except for your obligation to love one another. If you love your neighbor, you will fulfill the requirements of God’s law. Romans 13:8
This is the message you have heard from the beginning: We should love one another. 1 John 3:11