Helen Keller's biography, The Story of My Life has inspired many people whether in relation to their own personal challenges or the recognition of their "gift" of sight and the unending possibilities of life.
In an effort to explain herself and any potential inconsistencies that may exist in The Story of My Life, Helen explains her "fear" in attempting to lift " the veil that clings about my childhood like a golden mist." (Ch 1) Helen knows that her account reflects her personal feelings and interpretation which is mixed between "fact and fancy" which Helen admits can become indistinct sometimes.
Helen's own "prison-house" is the darkness which literally pervades her life after her illness when she feels confined and even trapped in her existence. Although Helen's story is a happy one and truly inspirational, she cannot overlook the "shadows." Many of Helen's memories are vivid and she is able to recall them without difficulty but there are some, "the rest," which represent this image of the prison. Fortunately, these "dark" moments and other "joys and sorrows of childhood have lost their poignancy.....in the excitement of great discoveries."
Helen Keller was a learned, well-read student and obviously familiar with Wordsworth's poetry (Poem No 99, stanza V) which obviously explains her feelings aptly. Wordsworth was comparing childhood to adulthood and Helen compares her vague memories to her vivid ones.