Once upon a time when there was no time.

There was no "before" the beginning of our universe, because once upon a time there was no time.

There is no reason that the universe should be designed for our convenience.

What cannot be known is more revealing than what can.

Some things are as they are regardless of what they were.

We are just strings of quarks living in a suburb of the local density maximum of the universe.

We can predict the present without having to know everything about the past.

If all the stars and galaxies in the universe today were smoothed out into a uniform sea of atoms, there would only be about one atom in every cubic meter of space.

There are only certain intervals of time when life of any sort is possible in an expanding universe and we can practise astronomy only during that habitable time interval in cosmic history.

When we try to observe things that are very small, the act of observation itself will significantly disturb the state we are seeking to measure.

We can never know the origins of the universe. The deepest secrets are the ones that keep themselves.

Credibility comes from results. Everything else is just marketing.

There is nothing in man or nature that does not ask questions.

Talking is like playing on the harp there is as much in laying the hand on the strings to stop their vibrations as in twanging them to bring out their music.

Everybody thought I was a bit of an eccentric for wanting to be out there looking at the stars, but I still do

You learn the most from life's hardest knocks.

To be sure, no piece of social machinery, however well constructed, can be effective unless there is back of it a will and a determination to make it work.

I see so many ways America uses to rob Negroes and it is sinful and America can't keep holding on, and doing these things.

The best part of being a pro is being able to travel around the world. I have met so many incredible people and experienced different cultures all through sport.

Alas, the spheres of truth are less transparent than those of illusion.

I sometimes close my eyes during a show because I have drawn a picture of an audience enjoying the show more on the back of my eyelids.