The contrast between the intended nobility of the colonial mission and its sordid reality is the engine of the plot. Kurtz writes a report on "The Suppression of Savage Customs" that ends with the scrawled note: "Exterminate all the brutes!" This contradiction is the heart of the book. A Heart of Darkness PDF is the best way to study these textual details. The novella is a scathing satire of European pretensions and a deep psychological study of a man who has lost his way.