"Intelligence is an extremely subtle concept. It's a kind of understanding that flourishes if it's combined with a good memory, but exists anyway even in the absence of good memory. It's the ability to draw consequences from causes, to make correct inferences, to foresee what might be the result, to work out logical problems, to be reasonable, rational, to have the ability to understand the solution from perhaps insufficient information. You know when a person is intelligent, but you can be easily fooled if you are not yourself intelligent"

"What we call human reason, is not the effort or ability of one, so much as it is the result of the reason of many, arising from lights mutually communicated, in consequence of discourse and writing."

"I am guiding you to seek truth from the facts of the historical conditions of our society and to identify the problems. The correct solutions will come with the correct identification of the problems."

"What is called the Law of Nations is not properly law, but a part of ethics: a set of moral rules, accepted as authoritative by civilized states. It is true that these rules neither are nor ought to b…"

"It's been on my mind – what would something be like if it were unbalanced? It's been a vexing question for a long time. But it took the experience of working with radical kinds of symmetry, not just a…"