check out our:
[When leaving the Inner Station with Kurtz]: "In front of the first rank, along the river, three men, plastered with bright red earth from head to foot, strutted to and fro restlessly. When we came abreast again, they faced the river, stamped their feet, nodded their horned heads, swayed their scarlet bodies; they shook towards the fierce river-demon a bunch of black feathers, a mangy skin with a pendant tail – something that looked like a dried gourd; they shouted periodically together strings of amazing words that resembled no sounds of human language; and the deep murmurs of the crowd, interrupted suddenly, were like the responses of some satanic litany." (3.30)
White men view the native Africans as "savages" in their paint and armed with their strange weapons. Their language is wholly alien to the Europeans and thus they consider it evil – a "satanic litany."