In Joseph Conrad's "Heart of Darkness," the phrase "but in the great demoralization of the land he kept up his appearance" highlights the resilience of an individual amidst widespread chaos and despair. This character demonstrates an inner strength, maintaining a facade of composure and dignity even while surrounded by moral decay. Such perseverance reflects significant personal integrity and a refusal to succumb to the surrounding negativity.

The reference to "that's backbone" underscores the importance of character and the ability to uphold one's principles despite external challenges. It emphasizes that true strength lies in the capacity to remain steadfast and maintain one's values when faced with adversity. This theme resonates throughout the novella, illustrating the struggle between civilization and savagery, as well as the complexities of human nature in difficult circumstances.