"Son of Cain" begins with an image that is hard to forget: a cup of silver and gold, handed to the speaker, filled with the blood of "my martyred brothers." The vessel is beautiful, even "bedewed with sweat and tears," but its contents are the suffering of other people. From the first stanza the poem sets luxury against labour and shows that the two are connected. Whatever comfort is on offer has been paid for by someone else's pain.
What the poem is about, at its core, is complicity. The speaker is offered a choice that is really no choice. Stanza five puts it plainly: "to die from want with decency, / Or bend my will at their command, / To live in luxury." Refusal means starvation; acceptance means becoming part of the system that produced the martyrs. The poem never says exactly who the "slaves and masters" are or where this world exists, and it is wiser not to guess. That vagueness works in its favour. The situation could be any in which someone prospers by joining the very order that harms their own people, and the poem is more about the moral weight of that bargain than about any single historical case.
The title does a great deal of the work. Cain is the first murderer, who killed his brother Abel, and the Bible says God set a mark on him. Collier lets this reverberate through the final stanza, where the speaker bears "the mark upon my brow." But there is a twist worth noticing. The speaker has not killed anyone; the brothers are "martyred" by others. Yet by drinking, he takes on Cain's guilt anyway. The poem suggests that benefiting from a wrong can make you answerable for it, and that the line between bystander and perpetrator is thinner than we like to think.
The voices in the poem are carefully managed. In stanzas two and three, the tempters speak, and their tone is chillingly breezy: "Drink your fill, and laugh or cry / As others do who are as good / And just as you." They flatter before they threaten. The phrase "your lonely desert / of pity and self-righteousness" turns the speaker's scruples into a barren wasteland, as if conscience were merely a form of vanity. It is a clever piece of pressure, because it makes refusal look like pride rather than principle.
The form mirrors this unease. The poem has no regular rhyme scheme, and the lines are of varying length, with the second line of each stanza indented. The effect is slightly lopsided, like a person off balance. When rhyme does flicker, as in "decency" and "luxury," it is a sour, almost mocking echo, linking the two words the poem wants us to see as incompatible. Near the end the stanza stretches to five lines, one longer than the rest, as though the consequences simply will not stop. The final phrase, "through all time to come," seems to hang over the poem and leaves no room for relief.
Pay attention, too, to the thirst. "In my burning thirst / I drained the bitter cup" is the poem's most honest line. The speaker does not pretend to have been tricked or forced at gunpoint; he was desperate, and he gave in. The cup is "bitter" even as he drinks it, so there is no pleasure to excuse him. Compare this with the "nobler souls" of stanza six, who "spurned the fatal draught" and "turned away from death in life." The speaker admits he is not one of them. That admission, rather than any accusation of others, gives the poem its moral force.
What makes "Son of Cain" worth reading is this refusal to flatter its own narrator. It would have been easy to write a poem of pure outrage against the masters. Instead, Collier writes a confession, and the confession implicates anyone who has ever taken the easier road. The poem is brief and plain-spoken, yet it leaves a question that lingers after the last line: what would you have done with the cup in your hand?