:sl:
I knew there had to be a logical explanation for this... I posted on another discussion board and this was the answer:
The pinnacle of earthly bliss was reached when Adam and Eve witnessed the birth of their 1st children, a set of twins. Adam was a devoted father and Eve a contented mother. The twins were Cain (Qabil) and his sister. Later Eve gave birth to a second set of twins, Abel (Habil) and his sister. The family enjoyed the bounties and fruits of the earth provided by their Lord. The children grew up to be strong and healthy young adults. Cain tilled the land while Abel raised cattle.
The time arrived when the two young men desired life partners. This was part of Allah’s plan for mankind, to multiply and form nations with different cultures and colors. Allah revealed to Adam that he should marry each son to the twin sister of the other. Adam instructed his children according to Allah's command, but Cain was displeased with the partner chosen for him, for Abel's twin sister was not as beautiful as his own.
It appears that since the beginning of time, physical beauty has been a factor in the attraction between man and women. This attraction caused Cain to envy his brother Abel. He rebelled against Allah's command by refusing to accept his father's advice.
At first glance Cain's rebellion might appear strange, but we should remember that although man has a pure nature, the potential for dichotomy exists. In other words, he had both good and bad qualities. He can become greedy, covetous,possessive, selfish and even destructive. Man is, therefore capable of seeking self-satisfaction even if it leads to failure in this life and in the hereafter. The path to goodness lies in harnessing the enemy within him, his baser self by controlling evil thoughts and deeds and practicing moderation in his desires and actions. His reward then will be the delights of this world and the hereafter. Thus Allah tests us through our divided nature.
Adam was in a dilemma. He wanted peace and harmony in his family, so he invoked Allah for help. Allah commanded that each son offer a sacrifice, and he whose offering was accepted would have right on his side. Abel offered his best camel while Cain offered his worst grain. His sacrifice was not accepted by Allah because of his disobedience to his father and the insincerity in his offering.
This enraged Cain even further. Realizing that his hopes marrying his own beautiful sister were fading, he threatened his brother. "I will kill you! I refuse to see you happy while I remain unhappy!"
Abel feeling sorry for his brother, replied, "It would be more proper for you, my brother to search for the cause of your unhappiness and then walk in the way of peace. Allah accepts the deeds only from those who serve and fear Him, not from those who reject His Commands."
Abel was intelligent, obedient, and always ready to obey the will of Allah. This contrasted sharply with his brother who was arrogant, selfish and disobedient to his Lord. Abel did not fear his brother's threats, but neither did he want his brother to be hurt, Allah had blessed Abel with purity and compassion.
Hoping to allay the hatred seething in his brother Abel said, " My brother, you are deviating from the right path and are sinful in your decisions. It is better that you repent to Allah and forget about your foolish threat. But if you do not then I will leave the matter in the hands of Allah. You alone will bear the consequence of your sin, for the Fire is the reward of the wrong-doers."
This brotherly plea did nothing to lessen the hatred in Cain's heart, nor did he show fear of Allah's punishment. Even familial considerations were cast aside. Cain struck his brother with a stone killing him instantly. This was the 1st death and the 1st criminal act committed by man on earth.
http://sisters.islamway.com/forum/in...wtopic=9940&hl
(Stories of the Prophets, by Ibn Kathir)