“When You Are Old” is obviously a very romantic poem but it is also about aging.
William Butler Yeats is a beloved poet means he likes to write romantic poetry because he also love someone. He is describing his love in this poem by saying that aging and beauty does not matter. He also says that the girl that he love was more beautiful when she was young but when she got old she was not that beautiful. William Butler Yeats tells his beloved in this poem that when you got old read the book that he wrote and realize that he loved her with her inner beauty rather than her outer beauty. So aging and beauty is not always something to love someone.