Three large windows with extensive views dominate the room in which I wrote most of this book. As I immersed myself in the scientific writings of Mary Somerville and looked at the world outside through the lenses her writing provided, those very familiar views took on an entirely new aspect, and the world of nature became much more vast, vivid, and dynamic than I had ever imagined it could be. My own powers of perception had been expanded as I watched Somerville exercise hers. I hope I have succeeded in conveying the power of Somerville's transforming vision. Its power derives in large part from Somerville's ability to use science to heighten perception and stimulate imagination.

The utilitarian goals commonly associated with science often overshadow its other functions.