“Never let your sense of morals get in the way of doing what’s right.”

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.

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

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.”

There is an art to science, and a science in art; the two are not enemies, but different aspects of the whole.

Inspect every piece of pseudoscience and you will find a security blanket.

I don’t believe in an afterlife, so I don’t have to spend my whole life fearing hell, or fearing heaven even more. For whatever the tortures of hell, I think the boredom of heaven would be even worse.

And above all things, never think that you’re not good enough yourself. A man should never think that. My belief is that in life people will take you at your own reckoning.