Whenever I lookat a vastbodyofwaterstretchingallthewaytothehorizon, I becomesuddenlyandnewlyawarethat I amon a planetlike I'm on a ballheatedby a distantlightin a waythatallowsforthiswatertobeallinallquitetemperate.
Andlifeisnotjustcontingentuponthatdistantlight, butinmanyways a directproductofthelight.