I am no ecological Pollyana. I have borne, and will continue to bear, feelings of wholehearted melancholy over the ecological state of the earth. How could I not? How could anyone not? But I am unwilling to become a hand-wringing nihilist, as some environmental 'realists' seem to believe is the more mature posture. Instead, I choose to dwell, as Emily Dickinson famously suggested, in possibility, where we cannot predict what will happen but we make space for it, whatever it is, and realize that our participation has value. This is grown-up optimism, where our bondedness with the rest of creation, a sense of profound interaction, and a belief in our shared ingenuity give meaning to our lives and actions on behalf of the more-than-human world.