“I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong. If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives. We will not become enthusiastic for the fact, the knowledge, the absolute truth of the day, but remain always uncertain … In order to make progress, one must leave the door to the unknown ajar.”

“[Doubt] is not a new idea; this is the idea of the age of reason. This is the philosophy that guided the men who made the democracy that we live under. The idea that no one really knew how to run a government led to the idea that we should arrange a system by which new ideas could be developed, tried out, and tossed out if necessary, with more new ideas bought in - a trial-and-error system. This method was a result of the fact that science was already showing itself to be a successful venture at the end of the eighteenth century. Even then it was clear to socially minded people that the openness of possibilities was an opportunity, and that doubt and discussion were essential to progress into the unknown. If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar...doubt is not to be feared, but welcomed and discussed.”

“I think the truth to living fully is to appreciate what we have, day by day, regardless of what we know might come our way.”

“Must the interest of life wane for us all as the progress of knowledge curtails the playground of imagination? No doubt it must in some measure, but there is another cause.I believe that in these days we have too many occupations, too many interests; we know too many things, and, if you will, have too many advantages and facilities. Our faculty of taking an interest is dissipated and frittered away.”

“Leaving traces of ourselves, as in creative productivity, could then be seen as part of the definition of consciousness for us as well. We know that in order to progress we must stretch for something just out of reach--if only for a life that will be more compassionate and decent than the cruelty, paranoia, greed, narrow corporatism, or narcissism we mostly indulge in and find such ample justification for. And so we dream.”

“The truth is that we all live by leaving behind; no doubt we all profoundly know that we are immortal and that sooner or later every man will do all things and know everything.”