Billions and billions.

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.

Nothing can stop you from being happy except yourself. Focus on positive thoughts.

First impression is not the last reflection of a true friend, so if you are head over heels for someone who just bought you a cake, you'd better think twice before devouring your misery.

You’re the prettiest thing I’ve seen fall from the sky today.

China leads the world in energy consumption, carbon emissions, and the release of major air and water pollutants, and the environmental impact is felt both regionally and globally.

It is going to take a very brave man to love me.

I'm working when I'm fighting with my wife. I constantly ask myself-how can I use this stuff to literary advantage.

A courage which looks easy & yet is rare; the courage of a teacher repeating day after day the same lessons - the least rewarded of all forms of courage.

[I'm] almost positive there is no God.

The one is none other than the All, the All none other than the One.