“When pigs fly” indicates we think something is impossible. As does “when fish ride bicycles”. True enough, but what a delightful, whimsical way of saying we think it’s never going to happen. Generally our pessimism, justified as it may be, takes on a darker tone, as in “when hell freezes over”, or “spitting in the wind”. No doubt we have more words for the absolutely impossible than the possibly attainable, and we can be particularly reluctant to share what others might call our “pipe dreams”. But while big dreams certainly can go up in smoke, they are also the only way big things happen. Even truly impossible dreams, like charging windmills, can also come to good ends. Dreamers have a way of “upsetting the applecart” regarding our comfortable way of doing things, including within our own families. But dreaming big allows us to catch a glimpse of those cool pigs flying by, just out of reach.