The theme of brotherly love God begins to treat it from the very beginning of creation with the story of the first two children of the first married couple that God had formed in Adam and Eve. This couple when they were expelled from the Garden of Eden had two sons, Cain the elder and Abel the youngest.

The fact that Adam and Eve no longer had that direct communion with God because of their sin of disobedience, that did not imply for God to take care of their children. God kept track of how Cain and Abel related. So much so, that after Cain killed his brother Abel, God claimed his lack of care towards his brother, to the point that Cain ironically replied to the Lord: "Am I my brother's keeper?"

It is supposed to have been a very grotesque response on the part of Cain, who took little brotherly love. If we believe that God does not look at how we relate to each other in the family, at church, at work, or anywhere we deal with people, we are very wrong. Let us not forget that God is Omnipresent and is everywhere looking above all at the behavior of the Christian people.

So, the way we deal with people or our brothers, we will give an account before God. Let's not forget that the violent and aggressive way in which Cain treated his brother caused God to cast curses on Cain, taking away his ability to cultivate the land and sentenced him to a life of fugitive and vagabond.

12 When you till the land, it will no longer give you its strength; you will be a wanderer and a stranger on earth. 13 And Cain said to Jehovah, Great is my punishment to be borne. 14 Behold, you are driving me out of the land today, and from your presence I will hide myself, and I will be a wanderer and a stranger in the land; and it will happen that whoever finds me will kill me. Genesis 4: 12-14.