John Green said this quote

.. the smell of canals and cigarette smoke, all the people sitting outside the cafés drinking beer, saying their r's and g's in a way I'd never learn. I missed the future. Obviously I knew even before this recurrance that I'd never grow old with Augustus Waters. But thinking about Lidewij and her boyfriend, I felt robbed. I would probably never again see the ocean from thirty thousand feet above, so far up you can't make out the waves or any boats, so that the ocean is a great and endless monolith. I could imagine it. I could remember it. But I couldn't see it again, and it occurred to me that the voracious ambition of humans is never sated by dreams coming true, because there is always the thought that everything might be done better and again. That is probably true even if you live to be ninety.