Bioethics is a cautionary field. It warns society to be aware that the real danger lies not so much in ignorance but in the illusion of knowledge—and to be prepared for the unexpected. At the same time, bioethicists are an optimistic group in that we stake our professional lives on the belief that there is such a thing as progress. The point of our efforts is to help us to be wiser in our choices by expanding our views and avoiding overgeneralizations. Wisdom, however, is a long-term investment requiring far-reaching explorations.