My dear friends, I'm not writing anything new here. This is the oldest commandment in the book, and you've known it from day one. It's always been implicit in the Message you've heard.
On the other hand, perhaps it is new, freshly minted as it is in both Christ and you - the darkness on its way out and the True Light already blazing!
Anyone who claims to live in God's light and hates a brother or sister is still in the dark.
It's the person who loves brother and sister who dwells in God's light and doesn't block the light from others.
But whoever hates is still in the dark, stumbles around in the dark, doesn't know which end is up, blinded by the darkness.