Why did Cain kill Abel?
The history of the first among the people of fratricide is known to all - even non-believers and those who have not read the Bible. However, there are still disputes, for which Cain killed Abel. Most people agree that jealousy was the driving force; in the second, that Cain was jealous. But, like all biblical stories, this one has a broader interpretation.
Before we figure out what Cain killed Abel for, remember the story itself. There were two brothers: Abel was a cattle farmer and Cain was a farmer. Both brought a sacrifice to God: Abel - the first offspring of their flocks, Cain - the fruits of their lands. Only the gift of Abel, who ascended to the sky in flame, was accepted, but the agricultural gift was rejected. Cain "was very upset" and killed his brother. Moreover, when God asked him about Abel, he lied to him, saying that he did not know what had happened to him. In more detail this and other biblical parables can be studied in the article What is the Bible.
First of all, of course, God’s rejection of the gift of a farmer is striking, for which Cain seems to have killed Abel — he envied him for his success.And jealousy, without a doubt, is also here. However, the Monk Sirin believes that it is not so much jealousy and envy, but why the Lord did not accept the gift. Sirin says that Cain had herds and other good, but he limited himself to less valuable sacrifice. God understood this, therefore he did not accept. So Cain’s guilt was deeper and started earlier than he envied and killed his brother.
There is a wider opinion about the reasons why Cain killed Abel: Haggadah (a collection of parables and legends in Judaism) indicates that there was a fight between the brothers. Abel won, but he forgave and released Cain; the same considered himself offended by a loss and meanly killed his brother.
The symbolic meaning of Cain's image
For whatever Cain did not kill Abel, he remained in the world culture as a scoundrel, a liar and the first sinner - until the story of the brothers in the Bible, the word "sin" was not mentioned. The Cain seal, the mark left by God on the fratricide’s forehead, still denotes the “seal of the criminal” towards a person, and not necessarily the killer. It is because murder is not the only sin (or crime) committed by Cain.