Why did Rizal write 'My Last Farewell'?

As the name (which Rizal himself did not give) suggests, this patriotic poem was Rizal's final farewell to the land he so adored before being executed by firing squad. Since he arranged to have it delivered to his sister Narcisa he did intend that it should be published. Presumably it was intended to serve as a rallying cry to his fellow patriots who opposed the Spanish subjugation.