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"As for morality, well that's all tied up with the question of consciousness."
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"Obscenity is a cleansing process, whereas pornography only adds to the murk."

"Friendship (as the ancients saw) can be a school of virtue, but also (as they did not see) a school of vice. It is ambivalent. It makes good men better and bad men worse."

"I should have learned many things from that experience, but when I look back on it, all I gained was one single, undeniable fact. That ultimately I am a person who can do evil. I never consciously tried to hurt anyone, yet good intentions notwithstanding, when necessity demanded, I could become completely self-centered, even cruel. I was the kind of person who could, using some plausible excuse, inflict on a person I cared for a wound that would never heal."

"Prostitution' is a euphemism for rape incidents that the victim and the economy profits from."

"The distinction between pretending you are better than you are and beginning to be better in reality is finer than moral sleuth hounds conceive."

"Sooner or later sin makes its claim on a person."

"There never were greed and cunning in the world yet, that did not do too much, and overreach themselves. It is as certain as death."
Explore more quotes by Roger Penrose


"Ordinary photons do have spin, they have a notion of helicity so they spin around their direction on motion."


"As you say, the way string theory requires all these extra dimensions and this comes from certain consistency requirements about how string should behave and so on."


"But I think it is a serious issue to wonder about the other platonic absolutes of say beauty and morality."


"My own way of thinking is to ponder long and I hope deeply on problems and for a long time which I keep away for years and years and I never really let them go."


"And these little things may not seem like much but after a while they take you off on a direction where you may be a long way off from what other people have been thinking about."


"In the book, I make the point that here we have string theory and here we have twistor theory and we don't know if either one of them is the right approach to nature."


"Well, I don't know if I can comment on Kant or Hegel because I'm no real philosopher in the sense of knowing what these people have said in any detail so let me not comment on that too much."


"This book is about physics and its about physics and its relationship with mathematics and how they seem to be intimately related and to what extent can you explore this relationship and trust it."
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