For some, hope offers ineffectual lip service for change. Others see hope as a brave stance in the face of a difficult world. Rabbi Jonathan Sacks gives different names to these diverging views. “Optimism is a passive virtue, hope an active one. It needs no courage, only a certain naiveté, to be an optimist. It needs a great deal of courage to have hope.” How can we move hope beyond wishful thinking to life-giving vision?