Writing is perhaps the greatest of human inventions.

Somewhere, something incredible is waiting to be known.

It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.

Imagination will often carry us to worlds that never were. But without it we go nowhere.

I don't want to believe. I want to know.

The absence of evidence is not the evidence of absence.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

For small creatures such as we the vastness is bearable only through love.

You have to know the past to understand the present.

What is life, without someone to share with?

Nothing shocks our moral feelings so deeply as cruelty does. We can forgive every other crime, but not cruelty. The reason for this is that it is the very opposite of compassion.

I have a feeling that we have been placed on this earth for a special reason and although I have not fulfilled all my missions, I am trying.

What world lies beyond that stormy sea I do not know, but every ocean has a distant shore, and I shall reach it.

Perfect health depends upon perfect circulation.

Today, I’m a conservationist because I believe that my species doesn’t have the right or option to determine the fate of other species, even ones that inspire fear in us.

I never imagined myself as an actor who would be in films. I always only thought of myself being in a play or a musical.

Yes, risk-taking is inherently failure-prone. Otherwise, it would be called sure-thing-taking.

You can make money two ways - make more, or spend less.

Size without shape is grotesque.