In the quote from Joseph Conrad's "Heart of Darkness," the author reflects on the transient nature of life and civilization. The phrase "We live in the flicker" suggests that human existence is brief and fleeting, comparable to a flickering light. This impermanence highlights the fragility of our achievements and the experiences we hold dear.

Conrad contrasts this temporary "flicker" with the notion of enduring darkness, which loomed over humanity. The mention of darkness representing past struggles and the potential for regression reminds us that shadows of despair can always resurface, despite the moments of light we experience. It serves as a poignant reminder of the duality of existence and the constant interplay between hope and despair.