Yahweh said to Cain, “Where is Abel, your brother?” He said, “I don’t know. Am I my brother’s keeper?”
Genesis 4:9 (WEB)
in its setting: Genesis 4:3-12
1 Where we are
Mr Kannan is sixty-two, and for nineteen years he has swept his own corridor every Saturday morning. At twenty past eight he is at the drinks stall in the void deck, and the talk is about the man from the next block who went up onto the parapet last Sunday and came down alive. Two floors below, Friday's lanterns are still strung along the railings. Kannan nods along. Then he understands that he could not have said the man's name. He wants the nodding at the lift to have counted as knowing — because if it does not, nobody in this block knows him either.
2 What the passage is doing
The question comes in a field outside Eden, after a first family's worship has gone wrong and one brother has killed the other. God already knows what happened. He asks anyway — "Where is Abel your brother?" — the same way he once walked into the garden asking Adam where he was. A question is not an accusation. It opens a door and leaves it open. Cain shuts it with a lie and a joke about herding, and the ground answers in his place.
שֹׁמֵר
shomer · keeper, one who watches over
The root shamar is what Adam does for the garden, what a shepherd does through the night, and what God himself does in the old blessing, "the LORD bless you and keep you." It is not ownership. It is staying awake near something fragile. Cain uses the word as sarcasm, as if watching over a brother were beneath a grown man. He has the right word in his mouth and refuses its weight.
3 Taking it with you
Perhaps you are hearing what Kannan heard at that drinks stall: that living near people is not the same as knowing them, and that nobody may know you either. Hear this before anything else. God does not arrive with an accusation. He arrives with a question, and a question means he is still speaking to you. Christ came down into a street where nobody knew him, and he learned names — yours first, long before you ever kept anyone. You are known this morning even if no one on your floor could say your name. Learning one name today will not buy back nineteen years. Learn it anyway, as someone already kept.
A prayer you can pray
God, I did not know him, and I am sorry. I have lived close to people and called it knowing. You ask me where my brother is and you do not shout. Thank you that you know my name before I know anyone's. Keep me awake to the person four doors down, and keep me, because I cannot keep myself. Amen.
Soli Deo Gloria — to God alone be the glory.