Jesus commanded His disciples to love one another. He told them that such love would identify them in the world and that He His life was the standard of love. Love for your brother is a distinctive of believers but was actually meant for every image bearer from the beginning.
For this is the message that you have heard from the beginning, that we should love one another. (1 John 3:11)
When is this “beginning”? Maybe John meant the beginning of Jesus’ ministry. But the biblical reports of Jesus’ early message were about calls to repent not calls to love. More likely John’s use of “beginning” refers to the beginning of beginnings, the beginning when the Word was with God and was God and then made all things. The message of brotherly love began in Genesis.
Further evidence for the historic nature of this message follows from John’s illustration in the next verse.
We should not be like Cain, who was of the evil one and murdered his brother. (1 John 3:12a)
We’ll can consider why Cain killed Abel later. For now, let’s meditate on the fact that the call to love is as old as dirt made into man. From the beginning men were created in the image of the God of love and we are to love the people we can see (family, brothers, one another). We are to do it in deed and in truth, not just in word or talk.
According to John “we know that we have passed out of death into life because we love the brothers” and “whoever does not love abides in death” (1 John 3:14). How we treat one another, not merely how many Hebrew or Greek or English words we can list for love, is the behavior expected from the beginning.