Who are we, if not measured by our impact on others?

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.

My heart is small, like a love of buttons or black pepper.

You can do something, but not everything.

Gina always believed there was magic in the world. "But it doesn't work in the way it does in fairy tales, " she told me. "It doesn't save us. We have to save ourselves.

The only answer to fear is faith in God, knowing He loves you unconditionally and individually.

To call yourself a socialist in 2015 is to be an idiot. Socialism fails. Everywhere.

I wanted to be a star, not a gallery mascot.

Tragedy is the highest form of art.

With God, it isn’t who you were that matters; it’s who you are becoming.

Do not put off today's work for tomorrow.

The first hundred years are the hardest.