The speaker says that she has been changed by the experience of visiting her native country because she recognizes the continuity of her life in her new environment. In the many years before returning, she had taken up an entirely new life, and realizes that, in effect, she has had two lives, or two separated parts of one life. Even though she has virtually forgotten the first part, it is still there, within her, as she sings a song she had not realized was a part of her that still existed. The song symbolizes the virtually forgotten part of her that will always be there even though it may rise to her consciousness only subliminally. Her husband, on the other hand, has not changed because he is simply a visitor in her native country, and his visit cannot occasion any deeply rooted memories.