“...I believe that nothing that once was can be completely undone. Even if destroyed in the material world and forgotten by men, it remains and will remain alive in the memory of an infinite being for which the past as well as the future is always present, and that is thus the greatest, the only true historian, and the keeper of the eternal tradition of which even our best human traditions ...are but shadows and images.”

“The world was full of righteous things that remained undone.”

“Those societies in which seriousness, tradition, conformity and adherence to long-established - often god-prescribed - ways of doing things are the strictly enforced rule, have always been the majority across time and throughout the world. Such people are not known for their sense of humour and lightness of touch; they rarely break a smile. To them, change is always suspect and usually damnable, and they hardly ever contribute to human development. By contrast, social, artistic and scientific progress as well as technological advance are most evident where the ruling culture and ideology give men and women permission to play, whether with ideas, beliefs, principles or materials. And where playful science changes people's understanding of the way the physical world works, political change, even revolution, is rarely far behind.”

“If the future is to remain open and free, we need people who can tolerate the unknown, who will not need the support of completely worked out systems or traditional blueprints from the past.”

“Our moods change constantly and thus our ideas about the past change with them. As for the future, it remains unwritten. Anything can happen, and often we are wrong. The best we can do with the future is prepare and savor the possibilities of what can be done in the present.”

“The miracle of the appropriateness of the language of mathematics for the formulation of the laws of physics is a wonderful gift which we neither understand nor deserve. We should be grateful for it and hope that it will remain valid in future research and that it will extend, for better or for worse, to our pleasure, even though perhaps also to our bafflement, to wide branches of learning.”

“Memory, therefore, not simply as the resurrection of one’s private past, but an immersion in the past of others, which is to say: history - which one both participates in and is a witness to, is a part of and apart from. Everything, therefore, is present in his mind at once, as if each element were reflecting the light of all the others, and at the same time emitting its own unique and unquenchable radiance.”