Many forms of darkness are thus present throughout the novel from the very title to the atmosphere described in Marlow’s narrative. The title Heart of darkness not only refers to a physical location inside Africa, but also to a state of mind and the grim consequences of imperialism. The text considers the deep jungle of Africa as the heart of darkness both for its untamed and hostile wilderness and for its supposed "savages" – the black native Africans – who reside there, practicing certain non-European customs such as cannibalism. Also present are a few corollaries to darkness. The fog being a major one.
“When the sun rose there was a white fog, very warm and clammy, and more blinding than the night.” It is stated in the quote that the fog is more blinding than the night – which is the darkness in this context. Because of the fogs obscurity, it may be implied that it gives enough information to begin making decisions but no means to judge the accuracy of that information. Marlow’s steamer is caught in the fog, meaning that he has no idea where he’s going and no idea whether peril or open water lies ahead of him.
“You looked on amazed and began to suspect yourself