Then Marlow detects that European colonialism not only plunges the land into deeper darkness, but also gives rise to "the darkness" in man's inner world, that is, the evil in human nature.

其次，马洛察觉到欧洲人的殖民活动给刚果带来更深的黑暗的同时，也使这片土地上的人的内心世界中的“黑暗”——人性的恶暴露无疑。