"Two nations between whom there is no intercourse and no sympathy who are as ignorant of each other's habits, thoughts, and feelings, as if they were dwellers in different zones, or inhabitants of different planets. The rich and the poor."

"Fear makes us feel our humanity."

"Yes, I am a Jew, and when the ancestors of the right honorable gentleman were brutal savages in an unknown island, mine were priests in the temple of Solomon."

"Conservatism discards Prescription, shrinks from Principle, disavows Progress having rejected all respect for antiquity, it offers no redress for the present, and makes no preparation for the future."

"Our science has become terrible, our research dangerous, our findings deadly. We physicists have to make peace with reality. Reality is not as strong as we are. We will ruin reality."

"It has become part of the accepted wisdom to say that the twentieth century was the century of physics and the twenty-first century will be the century of biology."

"You can search throughout the entire universe for someone who is more deserving of your love and affection than you are yourself, and that person is not to be found anywhere. You yourself, as much as anybody in the entire universe deserve your love and affection."

"Good science fiction is intelligent. It asks big questions that are on people's minds. It's not impossible. It has some sort of root in the abstract."