“Nostalgia is a necessary thing, I believe, and a way for all of us to find peace in that which we have accomplished, or even failed to accomplish. At the same time, if nostalgia precipitates actions to return to that fabled, rosy-painted time, particularly in one who believes his life to be a failure, then it is an empty thing, doomed to produce nothing but frustration and an even greater sense of failure.”

“It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them.”

“One does not have to be a philosopher to be a successful artist, but he does have to be an artist to be a successful philosopher. His nature is to view the world in an unpredictable albeit useful light.”

“The motive behind criticism often determines its validity. Those who care criticize where necessary. Those who envy criticize the moment they think that they have found a weak spot.”