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Am I My Brother's Keeper?

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“Am I My Brother’s Keeper?”

A Sermon on Genesis 4:1–16

By Rev. Betsey Moe

Community Presbyterian Church, Post Falls, Idaho – July 6, 2025

Scripture: Genesis 4:1–16

1 Now the man knew his wife Eve, and she conceived and bore Cain, saying, “I have produced a man with the help of the Lord.”
2 Next she bore his brother Abel. Now Abel was a keeper of sheep, and Cain a tiller of the ground.
3 In the course of time Cain brought to the Lord an offering of the fruit of the ground,
4 and Abel for his part brought of the firstlings of his flock, their fat portions. And the Lord had regard for Abel and his offering,
5 but for Cain and his offering he had no regard. So Cain was very angry, and his countenance fell.
6 The Lord said to Cain, “Why are you angry, and why has your countenance fallen?
7 If you do well, will you not be accepted? And if you do not do well, sin is lurking at the door; its desire is for you, but you must master it.”

8 Cain said to his brother Abel, “Let us go out to the field.” And when they were in the field, Cain rose up against his brother Abel and killed him.
9 Then the Lord said to Cain, “Where is your brother Abel?” He said, “I do not know; am I my brother’s keeper?”
10 And the Lord said, “What have you done? Listen, your brother’s blood is crying out to me from the ground!
11 And now you are cursed from the ground, which has opened its mouth to receive your brother’s blood from your hand.
12 When you till the ground, it will no longer yield to you its strength; you will be a fugitive and a wanderer on the earth.”
13 Cain said to the Lord, “My punishment is greater than I can bear!
14 Today you have driven me away from the soil, and I shall be hidden from your face; I shall be a fugitive and a wanderer on the earth, and anyone who meets me may kill me.”
15 Then the Lord said to him, “Not so! Whoever kills Cain will suffer a sevenfold vengeance.” And the Lord put a mark on Cain, so that no one who came upon him would kill him.
16 Then Cain went away from the presence of the Lord and settled in the land of Nod, east of Eden.

Sibling Relationships and Rivalry

How many of you have or had siblings? Life with siblings is complicated, isn’t it? Research shows that siblings shape us as much as our parents do. They bring out both the worst and the best in us.

We see dramatic sibling rivalry in the story of Cain and Abel. The language of the text makes it clear this is a “brother” story: Abel is referred to as Cain’s brother repeatedly. This story explores what it means to be a sibling in a broken world.

If the Adam and Eve story focused on the human-divine relationship, the Cain and Abel story focuses on the human-to-human relationship — and how those relationships break down when humans play God.

This is the first of many sibling stories: Isaac and Ishmael, Jacob and Esau, Joseph and his brothers, Moses and Aaron, David and his brothers, the Prodigal Son and his elder brother, Mary and Martha. In all of them, we see conflict and the struggle to share space with others whom God calls beloved.

The Unfairness and Response of Cain

Cain was a tiller of the ground — a God-given vocation. Abel was a shepherd. When they brought offerings, God favored Abel’s offering but not Cain’s. It seems unfair, but sometimes life isn’t fair. The story pauses to ask: How will Cain handle this unfairness?

Ron Howard and his brother Clint illustrate this imbalance. Ron became famous, while Clint struggled with jealousy and turned to drugs. Cain, on the other hand, let jealousy turn into violence and killed his brother.

Violence Lurking at the Door

Most of us would never imagine committing murder, but violence — and the roots of it — are closer than we think. Jesus said that the tendency toward violence shows up as anger and insults (Matthew 5:22). Cain’s story plays out not just in murders but in everyday dehumanizing behaviors, rhetoric, and divisions.

Pastor Heidi DeJonge writes:

“Often we’re threatened by people who are a burden to us — those who stand in the way of our rights. And so we take the lives of the voiceless unborn, or the oldest among us by shutting them away. We take the lives of murderers and terrorists without a blink. We take the lives of the poor by ignoring their cries for help — telling them to pull themselves up by their bootstraps.”

How are we letting violence win in our lives? Maybe not by aggression, but by avoidance or apathy — treating others as burdens rather than gifts.

The Gospel Lens: A New Way Forward

If we stopped with Cain and Abel, we might feel hopeless. But Jesus took the violence of the cross into himself so that we don’t have to live in cycles of violence anymore. A new way is possible — one marked by reconciliation, mutual respect, and care for one another.

Even in the Cain and Abel story, God shows us this new way:

  • God comes near and speaks to Cain about his anger.
  • After the murder, God gives Cain the chance to confess and recognize Abel’s humanity.
  • God marks Cain — not to condemn him, but to protect him.

God stands in the way of the cycle of violence. God shows a way that refuses to dehumanize others, speaks against violence, and cares for humanity.

Living Differently in a Violent World

We cannot rewind the past, but we can choose how we live now. We can support one another, love radically, and celebrate life rather than take it. We can heed Paul’s words to the Romans:

“Hold fast to what is good; love one another with mutual affection; outdo one another in showing honor… Contribute to the needs of the saints; pursue hospitality to strangers… Never avenge yourselves. If your enemy is hungry, feed them. Do not be overcome by evil, but overcome evil with good.” (Romans 12)

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