“Nothing contributes so much to tranquilizing the mind as a steady purpose – a point on which the soul may fix its intellectual eye.” ~ Mary Wollstonecraft Shelley (August 30, 1797 to February 1, 1851)
Mary Wollstonecraft Shelley was a British novelist and writer. She is famously known for her novel Frankenstein, or The Modern Prometheus (1818). According to Wikipedia, she edited and promoted the work of her husband, the poet Percy Bysshe Shelley.
[Source for quotation: Do It! Let’s Get Off Our Buts, by John-Roger and Peter McWilliams (1991), page 140. Verified through use of ThinkExist.com, accessed November 18, 2010. Dates and biographical information from Wikipedia, accessed November 18, 2010.]