First son of Adam and Eve; first murderer
After the Fall · Old Testament
The firstborn of Adam and Eve, a farmer, whose jealousy of his brother Abel led to the first murder in human history (Genesis 4) — the prototype of sin's deadly trajectory.
Cain was the firstborn son of Adam and Eve, born after they were driven from Eden (Genesis 4:1). His mother, Eve, named him with hope: 'I have gotten a man from the LORD.' He was a tiller of the ground (Genesis 4:2); his younger brother Abel was a keeper of sheep. In due time both brought offerings to the LORD — Cain from the fruit of the ground, Abel from the firstlings of his flock. 'And the LORD had respect unto Abel and to his offering: But unto Cain and to his offering he had not respect' (Genesis 4:4-5). Why God preferred Abel's offering is debated — Hebrews 11:4 says 'by faith Abel offered unto God a more excellent sacrifice than Cain.' Abel offered his best by faith; Cain seems to have offered indifferently. God came to Cain in the wake of his anger: 'Why art thou wroth? and why is thy countenance fallen? If thou doest well, shalt thou not be accepted? and if thou doest not well, sin lieth at the door' (Genesis 4:6-7). God warned, but Cain did not repent. He spoke to Abel, and in the field 'Cain rose up against Abel his brother, and slew him' (Genesis 4:8) — the first murder in human history. God confronted Cain: 'Where is Abel thy brother?' Cain answered with the question that echoes through human history: 'I know not: Am I my brother's keeper?' (Genesis 4:9). God pronounced judgment — the ground would no longer yield its strength to Cain; he would be 'a fugitive and a vagabond' in the earth (Genesis 4:12). Cain protested that his punishment was greater than he could bear, fearing that anyone finding him would kill him. God set a mark on Cain so no one would slay him (Genesis 4:15). Cain went out from God's presence and dwelt in the land of Nod, east of Eden (Genesis 4:16). His descendants built cities and developed the arts of metalwork and music. The New Testament references Cain as the type of unbelief and hatred. Jude 1:11 — 'Woe unto them! for they have gone in the way of Cain.' 1 John 3:12 — 'Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.' Hebrews 12:24 — Christ's blood 'speaketh better things than that of Abel' — calling for mercy where Abel's called for justice.
"I have gotten a man from the LORD"
God had no respect for it
"Sin lieth at the door"
The first murder
"Am I my brother's keeper?"
Fugitive in the earth
East of Eden
Cain's significance: (1) He is the first murderer — the prototype of where unrepentant sin leads. (2) His 'Am I my brother's keeper?' is humanity's universal evasion of responsibility. (3) His offering shows that not all worship is acceptable — the heart matters (Hebrews 11:4). (4) His line stands in contrast to Seth's line, the line of faith. (5) The NT uses 'the way of Cain' (Jude 1:11) and 'as Cain' (1 John 3:12) as cautions against hatred and unbelief.
“I know not: Am I my brother's keeper?”— Genesis 4:9
“My punishment is greater than I can bear.”— Genesis 4:13
Cain was the firstborn son of Adam and Eve, a tiller of the ground (Genesis 4:1-2). When God respected his brother Abel's offering but not his, Cain rose up and killed Abel in the field — the first murder in human history (Genesis 4:8). God cursed him to be a fugitive, but set a mark on him for protection. He settled east of Eden and his descendants built cities.
Hebrews 11:4 — 'By faith Abel offered unto God a more excellent sacrifice than Cain.' The issue was not primarily what each brought but the heart behind it. Abel offered the firstlings of his flock with faith; Cain seems to have offered routinely, without devotion. God's response to Cain (Genesis 4:7) — 'If thou doest well, shalt thou not be accepted?' — suggests the problem was acceptance through right doing, not the type of offering.
Cain's evasive response to God in Genesis 4:9. He had killed Abel; God asked where Abel was. Cain feigned ignorance and disclaimed responsibility for his brother. The phrase has become a universal expression of evasion of human responsibility for one another. The Bible's answer, woven throughout Scripture, is yes — every person is, in some sense, his brother's keeper.
Genesis 4:15 — God 'set a mark upon Cain, lest any finding him should kill him.' The Bible does not describe what the mark was; speculation has included a tattoo, a brand, or a sign visible only to others. The mark's function was protective, not punitive — preventing vengeance and showing God's mercy even toward a murderer. The mark is not the same as Cain's curse.