“Historically, philosophy does not have an impressive track record of answering questions about natural world in a decisive manner.”

“An experiment is a question which science poses to Nature and a measurement is the recording of Nature's answer.”

“Nature does not teach. A true philosophy may sometimes validate an experience of nature; an experience of nature cannot validate a philosophy. Nature will not verify any theological or metaphysical proposition (or not in the manner we are now considering); she will help to show what it means.”

“Consider the track record of your naysayers. How many dreams have they successfully brought into this world?”

“In philosophy it is always good to put a question instead of an answer to a question. For an answer to the philosophical question may easily be unfair; disposing of it by means of another question is not.”

“The reason for thinking that there will be no 'last' philosophy is simply that no answer can fail to be an answer to a question, and no question can guarantee its own permanent relevance.”