When we lose one we love, our bitterest tears are called forth by the memory of hours when we loved not enough.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...'
The first precept was never to accept a thing as true until I knew it as such without a single doubt.
The people I distrust most are those who want to improve our lives but have only one course of action.
We have really everything in common with America nowadays except, of course, language.
The truth does not change according to our ability to stomach it.
Never read a book through merely because you have begun it.
The real problem is not whether machines think but whether men do.
I looked up and saw a bunch of military-looking guys in coveralls, holding big, bulky rifles and wearing hooded gas masks with tinted face-plates.