This bible study is about Cain and Abel and the jealous that Cain allowed to override his thoughts causing him to kill his brother Abel.  

Cain and Abel was the first biblical documentation of jealousy and murder mentioned in the Holy Bible. Adam and Eve (the first man and woman God created) had two sons, Cain (Qayin  pronounced kah'-yin which means possession in the original text) and Abel (Hebel pronounced heh'-bel which means breath in Hebrew) When Eve had Cain she said, “I have gotten a man from the Lord”. The name Cain means Possession in the original text.
and later on she had Abel. Cain was a tiller of the ground, he planted food to eat just as a farmer would today. Abel was a shepherd. Abel watched over flocks of sheep to protect them from wolves and other predators.
And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten
a man from the Lord. Gen.4:1
And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground. Gen. 4:2
The Offering
Cain and Abel brought offerings to the Lord. Each of their offerings were very different. Cain brought offerings from the fruit of the ground which would most likely be various kinds of vegetables while Abel brought the firstborn and fattest of his flock. The Lord had respect for Abel because of his offering and preferred Abel’s offering more than Cain’s. This made Cain very jealous and angry. The Lord told Cain not to feel that way because Cain and his offering was accepted. The Lord also gave Cain a warning that if he did not do well, sin lies at the door while trying to make him realize that he would rule over him.
And in process of time it came to pass, that Cain brought of the fruit of the ground an offering unto the Lord. Gen. 4:3
And Abel, he also brought of the firstlings of his flock and of the fat thereof. And the Lord had respect unto Abel and to his offering: Gen. 4:4
But unto Cain and to his offering he had not respect. And Cain was very wroth, and his countenance fell. Gen. 4:5
And the Lord said unto Cain, Why art thou wroth? and why is thy countenance fallen? Gen. 4:6
If thou doest well, shalt thou not be accepted? and if thou doest not well, sin lieth at the door. And unto thee shall be his desire, and thou shalt rule over him. Gen. 4:7
Cain Kills Abel
Cain had a talk with his brother Abel but apparently his jealous anger overcame him because when they were in the field, Cain killed Abel. The Lord knew what had happened and He asked Cain, “Where is Abel thy brother” Cain lied to the Lord and told Him that he did not know where his brother was and asked “Am I my brother’s keeper?” The Lord knew Cain was being untruthful, He knew Cain had killed his brother and He knew Cain was lying to Him. The Lord cursed Cain. Cain was a gardener, his crops were his living and the Lord cursed it so that Cain could no longer grow good crops, thereby taking away what Cain loved. The Lord told Cain that from that point on he would be a fugitive, a vagabond basically wandering the earth, homeless with no place to go.
And Cain talked with Abel his brother: and it came to pass, when they were in the field, that Cain rose up against Abel his brother, and slew him. Gen. 4:8
And the Lord said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper? Gen. 4:9
And he said, What hast thou done? the voice of thy brother's blood crieth unto me from the ground. Gen. 4:10
And now art thou cursed from the earth, which hath opened her mouth to receive thy brother's blood from thy hand; Gen. 4:11
When thou tillest the ground, it shall not henceforth yield unto thee her strength; a fugitive and a vagabond shalt thou be in the earth. Gen. 4:12
Cain Pleads with the Lord
Cain told the Lord that the punishment and banishment from the Lord for killing Abel was more than he could handle stating that everyone who would find him would kill him for what he had done. So the Lord put said that anyone who killed him the Lord’s vengeance would be upon them seven times whatever they did to Cain a placed a mark on Cain to protect him from those who might want to kill him.
And Cain said unto the Lord, My punishment is greater than I can bear. Gen. 4:13
Behold, thou hast driven me out this day from the face of the earth; and from thy face shall I be hid; and I shall be a fugitive and a vagabond in the earth; and it shall come to pass, that every one that findeth me shall slay me. Gen. 4:14
And the Lord said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the Lord set a mark upon Cain, lest any finding him should kill him. Gen. 4:15
Cain Moved to the Land of Nod, Married, Had a Son and Built a City
Cain knew he had done wrong and was determined to do well. He went away from the Lord’s presence, took a wife, and had a son named Enoch. Cain built a city and named the city after his son.
And Cain went out from the presence of the Lord, and dwelt in the land of Nod, on the east of Eden. Gen. 4:16
And Cain knew his wife; and she conceived, and bare Enoch: and he builded a city, and called the name of the city, after the name of his son, Enoch. Gen. 4:17
Cain’s son Enoch made Cain a grandfather when he had a son named Irad and Irad made him a great grandfather when he had his son Mehujael. Cain became a great great grandfather when Mehujael had a son name Methusael. Cain lived a long and productive life after killing his brother. Soon he became a great great great grandfather to Methusaels son Lamech.
And unto Enoch was born Irad: and Irad begat Mehujael: and Mehujael begat Methusael: and Methusael begat Lamech. Gen. 4:18
Lamech had two wives one wife was named Adah and his other wife was named Zillah. Lamech and his wife Adah had a son named Jabal. Jabal lived in tents and raised cattle. They also had a son named Jubal who was the first to use the harp and organ.
And Lamech took unto him two wives: the name of the one was Adah, and the name of the other Zillah. Gen. 4:19
And Adah bare Jabal: he was the father of such as dwell in tents, and of such as have cattle. Gen. 4:20
And his brother's name was Jubal: he was the father of all such as handle the harp and organ. Gen. 4:21
Lamech and his wife Zillah had a son and named him Tubalcain and he was an instructor for every kind of brass and iron. Lamech and Zillah also had a daughter, Tubalcain’s sister andher name was Naamah.
And Zillah, she also bare Tubalcain, an instructer of every artificer in brass and iron: and the sister of Tubalcain was Naamah. Gen. 4:22
Lamech killed a young man and confessed to his wives that if Cain was avenged seven times he would be avenged 77 times.
And Lamech said unto his wives, Adah and Zillah, Hear my voice; ye wives of Lamech, hearken unto my speech: for I have slain a man to my wounding, and a young man to my hurt. Gen. 4:23
If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold. Gen. 4:24
Adam and Eve had a third child. They named their son Seth. Eve stated that God had given her another “seed” child to replace Abel because Cain killed him. Seth had a son named Enos. After this, men began to call on the name of the Lord.
And Adam knew his wife again; and she bare a son, and called his name Seth: For God, said she, hath appointed me another seed instead of Abel, whom Cain slew. Gen. 4:25
And to Seth, to him also there was born a son; and he called his name Enos: then began men to call upon the name of the Lord. Gen. 4:26
Cain allowed his jealousy and anger to overcome his common sense and it caused him to sin and kill his brother Abel. The Lord could have killed Cain right then if He had wanted to. The Lord obviously loved and cared about Abel but he also loved and cared about Cain. He obviously forgave Cain because he allowed him to go on with his life but no longer was Cain in the presence of God because of his actions. This example demonstrates how easily people can be overcome by their emotions, particularly, jealousy in this instance. It is important to realize that jealousy if left unchecked has the capabilities of overriding your common sense and can cause you to sin as Cain did. If you find yourself feeling jealous and angry you should turn to the Lord right away and pray for Him to remove those angry feeling from your heart so you do not fall into sin or worse harm someone. Pray for the person you are upset with. Talk to your Pastor or a counselor that can pray for you and counsel you, this will help you to overcome those feelings.