Dear friends, I am not writing a new commandment, for it is an old one you have always had, right from the beginning. This commandment -- to love one another -- is the same message you heard before.
Yet it is also new. This commandment is true in Christ and is true among you, because the darkness is disappearing and the true light is already shining.
If anyone says, "I am living in the light," but hates a Christian brother or sister, that person is still living in darkness.
References for 1 John 2:9
Anyone who loves other Christians is living in the light and does not cause anyone to stumble.
References for 1 John 2:10
Anyone who hates a Christian brother or sister is living and walking in darkness. Such a person is lost, having been blinded by the darkness.