Answer:
His love for diamelen
Step-by-step explanation:
In The Lagoon, by Joseph Conrad, we meet Arsat, a man who is desperately in love with Diamelen. Diamelen is a servant to the Rajah's wife, and Arsat kidnaps her in order to be with her. He risks everything in the process, and ends up losing his brother. However, Diamelen dies towards the end, and Arsat decides to try to avenge his brother's death.