He wrote this to his love, Maud Gonne, and he was bewailing the fact that he couldn't really give her what he thought she wanted from him.
اون این شعر رو برای معشوقه اش گفت که اسمش ماود گان بود و شاعر ماتم داشت که آن چیزی را که فکر می کرد معشوقه اش از او می خواهد، نمی تواند به او بدهد.