The angel and devil on Nic's shoulder

The angel and devil on Nic’s shoulder is Jasper Sheff’s metaphor for his brother’s struggle with addiction. In the book, it gives a child a vivid way to describe why Nic may use drugs despite not wanting to, and why a gentler voice urging him otherwise can be difficult to hear. The image becomes more than an explanation: Jasper carries it into conversations beyond the family, even as Nic’s continuing drug use makes clear that understanding the struggle cannot resolve it.

The Image and Its Meaning

Jasper describes a cartoon figure with a devil on one shoulder and an angel on the other. The devil whispers into Nic’s ear; sometimes, Jasper says, the whisper grows too loud for Nic to resist. The angel is present too, but speaks more softly, and Nic cannot hear him. The picture holds two ideas together: Jasper does not believe Nic wants to take drugs, yet recognizes that wanting not to use does not always stop him. The conflict is represented not as a simple choice between good and bad, but as a struggle in which one voice can overpower another.

The metaphor also matters because the usual family explanation does not reach Jasper and Daisy. After Nic’s relapse, they have spoken with him by telephone but have not seen him. Calling addiction a disease offers little comfort: the symptoms they understand are familiar physical signs such as coughing, fever, or a sore throat, not the behavior and distress they see in Nic. Jasper’s image comes closer to making sense of what is happening, though it cannot make his absence or the family’s suffering easier.

A Brother’s Understanding

Jasper’s account is compassionate without denying the harm addiction causes. He describes Nic as caught between competing impulses rather than as simply choosing to hurt those around him. That distinction offers a way to think about his brother’s behavior, but does not remove the consequences of the relapse or the family’s need for time before welcoming Nic home. The image therefore remains an explanation, not a cure or a promise that the angel will prevail.

The Image Travels

Later, Jasper brings the story to a friend during a school field trip to Angel Island. The grade has spent the night there in cold, foggy conditions; Jasper and his friend talk in the dark after the friend asks how Nic is doing. Jasper answers that Nic is using drugs again. His friend, who has read a Times article, is surprised that someone who seems so smart and nice could be using drugs. Jasper answers, "I told him, 'I know. He is.'" He then repeats the angel-and-devil image and says he plans to speak with someone who helps families affected by addiction.

Jasper’s concern also takes the form of a small, direct gesture toward his brother. He asks whether he can send Nic a message from his father’s phone and writes, "Nic, B smart. Love, Jasper." The note does not explain the relapse or promise an outcome. Beside the more elaborate metaphor, its brevity conveys the bond the image is trying to protect: Jasper can acknowledge Nic’s drug use, affirm his goodness, and reach out to him at once.