We don't understand it as we understand electricity, even, but that doesn't warrant our saying it is something special, something different in kind and distinct from everything else in the universe — do you think it does? May it not be that life consists in a complexity of physical and chemical activities, of the same order as the activities we already know in science? I don't see, really, why we should imagine there is a special order of life, and life alone — — ”

The conversation had ended on a note of uncertainty, indefinite, wistful. But the purpose, what was the purpose? Electricity had no soul, light and heat had no soul. Was she herself an impersonal force, or conjunction of forces, like one of these? She looked still at the unicellular shadow that lay within the field of light, under her microscope.