The absence of evidence is not the evidence of absence.

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 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.

You can only fight one man at a time with a sword, but, with a pen, you can compose a lecture to bore legions of enemy troops to death.

Kali has a habit of doing these beautiful works that never translate during the races in the afternoon. They call animals like her morning glories, or horrendous bets. Take your pick.

Look, you don’t know what makes me tick, so stop assuming you do.

Do not desire to fit in. Desire to oblige yourselves to lead.

Auto insurance is a toll bridge, over which every honest driver has to pass.

It was a very hard thing to have crushed the heart, and the hopes, of a friend.

The other countries did not share the same concern the United States had in the early '90's - that North Korea actually had an ongoing nuclear weapons program.

One must not imitate the sun, one must make oneself into a sun.

I might be old, but I'm still desirable.

I don't think you can call yourself a freedom-loving American and be a Democrat.