“It has been my philosophy of life that difficulties vanish when faced boldly.”

I wish that I could say I was optimistic about the human race. I love us all, but we are so stupid and shortsighted that I wonder if we can lift our eyes to the world about us long enough not to commit suicide.

At odd and unpredictable times, we cling in fright to the past .

People who think they know everything are a great annoyance to those of us who do.

Intelligence is an accident of evolution, and not necessarily an advantage.

It is well-known that the friend of a conqueror is but the last victim.

Old people think young people haven’t learned about love. Young people think old people have forgotten about love.

Democracy cannot survive overpopulation. Human dignity cannot survive it. Convenience and decency cannot survive it. As you put more and more people into the world, the value of life not only declines, but it disappears. It doesn’t matter if someone dies.

The true delight is in the finding out rather than in the knowing.

To make discoveries, you have to be curious about why the universe is the way it is.

People think of education as something that they can finish.

The day you stop learning is the day you begin decaying.

You don’t need to predict the future. Just choose a future – a good future, a useful future – and make the kind of prediction that will alter human emotions and reactions in such a way that the future you predicted will be brought about.

The first law of dietetics seems to be: if it tastes good, it’s bad for you.

There seems to be a feeling that anything that is natural is good. Strychnine is natural.

The most exciting phrase to hear in science, the one that heralds new discoveries, is not ‘Eureka!’ but ‘That’s funny.’

The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that “my ignorance is just as good as your knowledge.”