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

Somewhere, something incredible is waiting to be known.

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.

Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.

I felt a wish never to leave that room - a wish that dawn might never come, that my present frame of mind might never change.

Find What You love And Let it kill You.

I wasn't quite as certain that I knew her soul. When it came right down to it, I wasn't sure she knew me either.

May the arm of the first member of Congress, who proposes a national religion, drop powerless from his shoulder; his tongue cleave to the roof of his mouth and all the people say amen.

A library is never complete. That’s the joy of it. We are always seeking one more book to add to our collection.

My business is circumference.

Right and wrong are concepts that only have meaning in this world, so by sorting existence on those characteristics, we are defining ourselves to exist only in this world.

I told the truth, and I did it on national TV in a lie-detector test.

Art is the accomplice of love.

Learning, like money, may be of so base a coin as to be utterly void of use; or, if sterling, may require good management to make it serve the purposes of sense or happiness.