A. Cain's murder of Abel.
1. (1) The birth of Cain.
Now Adam knew Eve his wife, and she conceived and bore Cain, and said, "I have acquired a man from the Lord."
a. Now Adam knew Eve his wife: This is the first specific mention of sex in the Bible. The term "knew" or "to know" is a polite way of saying they had sexual relations and the term is used often in the Bible in this sense (Genesis 4:17, 4:25, 38:26, Judges 11:39, 1 Samuel 1:19).
i. There is power in this way of referring to sex. It shows the high, interpersonal terms in which the Bible sees the sexual relationship. Most terms and phrases people use for sex today are either coarse or violent, but the Bible sees sex as a means of knowing one another in a committed relationship. "Knew" indicates an act that contributes to the bond of unity and the building up of a one-flesh relationship.
ii. We have no reason to believe Adam and Eve did not have sex before this. Adam and Eve were certainly capable of sexual relations before the fall, because there is nothing inherently impure or unclean in sex.
b. And bore Cain, and said, "I have acquired a man from the Lord": The name Cain basically means, "I've got him" or "here he is." It is likely Eve thought that Cain was the seed that God promised, the deliverer who would come from Eve (Genesis 3:15). There is a sense in which Eve said, "I have the man from the Lord."
i. Under normal circumstances, parents want good things for their children. They wonder if their children are destined for greatness. Adam, and especially Eve, had these expectations for Cain, but it went farther than normal parental hopes and expectations. Adam and Eve expected Cain to be the Messiah God promised.
ii. Eve thought she held in her arms the Messiah, the Savior of the whole world, but she really held in her arms a killer.
c. A man from the Lord: Eve had faith to believe that the little baby she held would be a man. No baby had ever been born before. It is possible Adam and Eve wondered if their descendants would come forth fully mature, as they did.
2. (2-5) The birth of Abel and the offerings of Cain and Abel.
Then she bore again, this time his brother Abel. Now Abel was a keeper of sheep, but Cain was a tiller of the ground. And in the process of time it came to pass that Cain brought an offering of the fruit of the ground to the Lord. Abel also brought of the firstborn of his flock and of their fat. And the Lord respected Abel and his offering, but He did not respect Cain and his offering. And Cain was very angry, and his countenance fell.
a. Abel was a keeper of sheep, but Cain was a tiller of the ground: We see agriculture and the domestication of animals were practiced among the earliest humans. Adam and his descendants did not spend tens of thousands of years living as hunter-gatherer cave dwellers.
b. Cain brought an offering of the fruit of the ground to the Lord: We can surmise that Cain brought his offering to the tree of life because cherubim guarded the tree of life (Genesis 3:24), and cherubim are always associated with the dwelling place or meeting place with God (Exodus 25:10-22). Cain and everyone else on the earth at that time probably met with God at the tree of life, where the cherubim were.
c. The Lord respected Abel and his offering, but He did not respect Cain and his offering: Abel brought an offering of blood (the firstborn of his flock) and Cain brought an offering of vegetation (the fruit of the ground). Many assume that this was the difference between their offerings, but grain offerings were acceptable before God (Leviticus 2), though not for an atonement for sin.
i. "The word for offering, minchah, is used in its broadest sense, covering any type of gift man may bring . . .. Neither of the two sacrifices is made specifically for sin. Nothing in the account points in this direction." (Leupold)
ii. The writer to the Hebrews makes it plain why the offering of Abel was accepted and the offering of Cain was rejected: By faith Abel offered up a more excellent sacrifice than Cain (Hebrews 11:4). Cain's offering was the effort of dead religion, while Abel's offering was made in faith, in a desire to worship God in spirit and in truth.
d. Abel also brought of the firstborn of his flock and of their fat: This shows Abel's offering was extra special. The fat of the animal was prized as its "luxury," and was to be given to God when the animal was sacrificed (Leviticus 3:16-17; 7:23-25). The burning of fat in sacrifice before God is called a sweet aroma to the Lord (Leviticus 17:6).
i. The offering of Cain was no doubt more aesthetically pleasing; Abel's would have been a bloody mess. But God was more concerned with faith in the heart than with artistic beauty.
ii. Here, it is one lamb for a man. Later, at the Passover, it will be one lamb for a family. Then, at the Day of Atonement, it was one lamb for the nation. Finally, with Jesus, there was one Lamb who takes away the sin of the whole world (John 1:29).
e. Respected . . . did not respect: We don't precisely know how Can and Abel knew their sacrifices were accepted or not accepted. Seemingly, there was some outward evidence making it obvious.
i. There are Biblical examples of having an acceptable sacrifice consumed by fire from God (Judges 6:21; 1 Kings 18:38; 1 Chronicles 21:26; 2 Chronicles 7:1). Perhaps an acceptable sacrifice, brought to the cherubim at the tree of life, was consumed by fire from heaven or from the flaming swords of the cherubim (Genesis 3:24).
f. Cain was very angry, and his countenance fell: Cain's anger was undoubtedly rooted in pride. He couldn't bear that his brother was accepted before God and he was not. It is even possible that this was public knowledge, if God consuming the sacrifice with fire indicated acceptance.
i. The epidemic of sin is quickly becoming worse. Cain now commits the rather sophisticated sins of spiritual pride and hypocrisy.
3. (6-7) God's warning to Cain.
So the Lord said to Cain, "Why are you angry? And why has your countenance fallen? If you do well, will you not be accepted? And if you do not do well, sin lies at the door. And its desire is for you, but you should rule over it."
a. Why are you angry? And why has your countenance fallen? God dealt with Cain in terms of loving confrontation instead of automatic affirmation. He made it clear that he would be accepted if he did well.
i. Of course, God knew the answers to those questions, but He wanted Cain to know and stop what was happening inside himself.
b. If you do not do well, sin lies at the door: God warned Cain about the destructive power of sin. Cain can resist sin and find blessing, or he can give in to sin and be devoured.
c. And its desire is for you, but you should rule over it: We prevent sin from ruling over us by allowing God to master us first. Without God as our master, we will be slaves to sin.
4. (8) Cain murders Abel.
Now 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 killed him.
a. Now Cain talked with Abel his brother: The sense is that Cain planned to catch Abel by surprise, lulling him with pleasant conversation. This shows that Cain committed premeditated murder, and therefore clearly ignored God's way of escape.
b. Cain rose up against Abel his brother and killed him: No human had ever died or been killed before, but Cain saw how animals were be killed for sacrifice. He extinguished Abel's life in the same way.
i. The downward course of sin has progressed quickly. Now the hoped-for redeemer is a murderer, and the second son is the victim of murder. Sin wasn't "nipped in the bud," and it could not be contained.
B. God confronts Cain.
1. (9) God questions Cain.
Then the Lord said to Cain, "Where is Abel your brother?" He said, "I do not know. Am I my brother's keeper?"
a. Where is Abel your brother: God knew the answer to this question. He asked Cain because He wanted to give him the opportunity to confess his sin and start to do right after doing wrong.
i. How futile it was for Cain to lie to God! It was madness for him to think God didn't know where Abel was, or that he could actually hide his sin from God.
b. Am I my brother's keeper? This reply of Cain is famous. The fact of the matter is that he was supposed to be his brother's keeper, but was instead his brother's murderer, and he murdered him for the lowest of reasons. Able had not injured Cain in any way. Cain's murderous rage was inspired purely by a spiritual jealousy.