In "A Scanner Darkly" by Philip K. Dick, the protagonist grapples with the effects of substance abuse and the loss of personal identity. Through a dystopian lens, the story critiques the nature of surveillance and control in society, where characters navigate a world filled with mistrust and deception. The narrative raises questions about morality and the consequences of one’s actions, particularly in the context of addiction and societal pressures.

The quote, "If I'd known it was harmless, I'd have killed it myself!" captures the irony of how individuals often misjudge the dangers of certain situations or substances. It reflects the internal conflict of the characters who struggle with their perceptions and realities. This sentiment resonates throughout the book, highlighting the tragic misunderstandings that lead to destruction and the profound impact of choices made under the influence of addiction.