Some 5 billion years from now, there will be a last perfect day on Earth... then the sun will begin to die, life will be extinguished, the oceans will boil and evaporate away.

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.

The trodden path is the safest.

A gender-equal society would be one where the word 'gender' does not exist: where everyone can be themselves.

In acting class, you talked always about keeping it real and don't act... connect with the people and connect with the partner that you're acting with. The same is also true in politics.

Calvin: Life's a lot more fun when you aren't responsible for your actions.

I look after myself. I train and go to the gym.

[Albert] Camus writes his acceptance speech for the Nobel Prize in thanks to his teacher.

The nature of the Catilinarian conspiracy was bad and bloody.

Fanatics have their dreams, wherewith they weave a paradise for a sect.

How do you even begin to return to someone, much less convince them to do the same for you? I had no idea. More than ever, though, right then I had to believe the answer would just come to me.

Half of the harm that is done in this world is due to people who want to feel important. They don't mean to do harm. But the harm does not interest them.