The passion to explore is at the heart of being human.

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.

Writing to her, I was no longer lonely... I could tolerate anything as long as I had a notepad and a pen and could pour my heart out to her in these letters.

I may not have a practical mind, but it's very fixated on concrete things. I like detail.

Precision is not one of the qualities that comes out in my work.

No, I'm so well-known at home I think they think of me like a piece of comfortable furniture that's always been around that they're not going to throw out.

I don’t count life as life without love

My happy thoughts help create my healthy body.

What is necessary is possible, what we want is expensive. What is unnecessary is unlikely.

I feel as a brand I'm here to be around for a long time.

Mysticism joins and unites; reason divides and separates. People crave belonging more than understanding. Hence the prominent role of mysticism, and the limited role of reason in human affairs.

Beware of the person who can't be bothered by details.