The shifts reinforce the emotional extreme's in Arsat's tale.
He is worried and grieving
Arsat and his brother run away with Diamelen.
Arsat's brother dies in battle while fighting alongside him. Arsat blames himself for his brother's death, feeling guilt and grief, which torment him long after the event.
In Joseph Conrad's "The Lagoon," while Arsat and Diamelen run into the canoe, Arsat's brother, who is known as the "unfortunate" one, is left behind. He is depicted as a figure of sorrow and regret, reflecting on the past and his own failures. His role emphasizes the themes of loss and the complexities of relationships, contrasting with Arsat's pursuit of love and escape. This dynamic adds depth to the narrative and highlights the emotional weight of Arsat's choices.