I had a project for my life which involved 10 years of wandering, then some years of medical studies and, if any time was left, the great adventure of physics.

Time can behave like another direction in space under extreme conditions.

Of course humans like to explore, and we should. There’s nothing wrong with that. But it’s more than that. It’s essential for your children and your children’s children.

Anytime I feel lost, I pull out a map and stare. I stare until I have reminded myself that life is a giant adventure, so much to do, to see.

I have often been downcast but never in despair; I regard our hiding as a dangerous adventure, romantic and interesting at the same time. In my diary, I treat all the privations as amusing.

I have enjoyed great satisfaction from my climb of Everest and my trips to the poles. But there’s no doubt that my most worthwhile things have been the building of schools and medical clinics.

I think we all change each other’s paths. I don’t know which law idea that is in physics, but I don’t think any of us can live without affecting one another.

I’m someone who likes plowing new ground, then walking away from it. I get bored easily. For me, the big thrill comes with the discovering.

Quarks came in a number of varieties – in fact, at first, only three were needed to explain all the hundreds of particles and the different kinds of quarks – they are called u-type, d-type, s-type.

An inconvenience is an adventure wrongly considered.

Philosophers have not kept up with modern developments in science. Particularly physics.

Because there is a law such as gravity, the universe can and will create itself from nothing.

My background educationally is physics and economics, and I grew up in sort of an engineering environment – my father is an electromechanical engineer. And so there were lots of engineery things around me.

When you are younger, you want to do everything, and you go haywire.

To the lover of wilderness, Alaska is one of the most wonderful countries in the world.

Despite all I have seen and experienced, I still get the same simple thrill out of glimpsing a tiny patch of snow in a high mountain gully and feel the same urge to climb towards it.

Sometimes the road less traveled is less traveled for a reason.

The Edge… there is no honest way to explain it because the only people who really know where it is are the ones who have gone over.

I tend to approach things from a physics framework. And physics teaches you to reason from first principles rather than by analogy.

Anyone who doesn’t have a great time in San Francisco is pretty much dead to me.

No one undertakes research in physics with the intention of winning a prize. It is the joy of discovering something no one knew before.

Nobody climbs mountains for scientific reasons. Science is used to raise money for the expeditions, but you really climb for the hell of it.

To be able to travel the world, especially to places I never thought I’d be… it’s really, you know, still fascinating for me.

It was Einstein’s dream to discover the grand design of the universe, a single theory that explains everything. However, physicists in Einstein’s day hadn’t made enough progress in understanding the forces of nature for that to be a realistic goal.

There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago.

I think my first thought on reaching the summit- of course, I was very, very pleased to be there, naturally – but my first thought was one of a little bit of surprise. I was a little bit surprised that here I was, Ed Hillary, on top of Mt. Everest. After all, this is the ambition of most mountaineers.

I was scared many times on Everest, but this is all part of the challenge. When I fell down a crevasse, it was pretty scary.

If you’re embarking around the world in a hot-air balloon, don’t forget the toilet paper.

I tell you the solemn truth, that the doctrine of the Trinity is not so difficult to accept for a working proposition as any one of the axioms of physics.

If you do not expect the unexpected you will not find it, for it is not to be reached by search or trail.

Well, the odds must be against anybody being able to fly around the world in a balloon on the first attempt. All of us who are attempting to go around the world in balloons are effectively flying in experimental craft because these craft cannot be tested.

Travel, in the younger sort, is a part of education; in the elder, a part of experience.

If a man’s wit be wandering, let him study the mathematics.

A life without adventure is likely to be unsatisfying, but a life in which adventure is allowed to take whatever form it will is sure to be short.

In the past, there was active discrimination against women in science. That has now gone, and although there are residual effects, these are not enough to account for the small numbers of women, particularly in mathematics and physics.

I would like to fly in space. Absolutely. That would be cool. I used to just do personally risky things, but now I’ve got kids and responsibilities, so I can’t be my own test pilot. That wouldn’t be a good idea. But I definitely want to fly as soon as it’s a sensible thing to do.

Plunge boldly into the thick of life, and seize it where you will, it is always interesting.

I’ve been here before and will come again, but I’m not going this trip through.

I did not wish to take a cabin passage, but rather to go before the mast and on the deck of the world, for there I could best see the moonlight amid the mountains. I do not wish to go below now.

Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.

I spent more time on dark ships in danger zones than any other woman in the world.

Most people have no concept of how an automatic transmission works, yet they know how to drive a car. You don’t have to study physics to understand the laws of motion to drive a car. You don’t have to understand any of this stuff to use Macintosh.

Rebellion is what you make of it. When you’ve been on a tour bus for two months straight, and then you get in your car and drive wherever you want, that can feel rebellious.

There are no black holes in the sense of regimes from which light can’t escape to infinity.

On life’s vast ocean diversely we sail. Reasons the card, but passion the gale.

I love traveling all over the world; but it’s true: there’s nothing like home.

Adventure is worthwhile in itself.

There is no way I would ask others to go on a Virgin Galactic flight if I didn’t feel it was safe enough for myself.

I like to think of Everest as a great mountaineering challenge, and when you’ve got people just streaming up the mountain – well, many of them are just climbing it to get their name in the paper, really.

My discovery that black holes emit radiation raised serious problems of consistency with the rest of physics. I have now resolved these problems, but the answer turned out to be not what I expected.

Often one postulates that a priori, all states are equally probable. This is not true in the world as we see it. This world is not correctly described by the physics which assumes this postulate.

A good traveler has no fixed plans, and is not intent on arriving.

After having dispatched a meal, I went ashore, and found no habitation save a single house, and that without an occupant; we had no doubt that the people had fled in terror at our approach, as the house was completely furnished.

The clearest way into the Universe is through a forest wilderness.

When you go to the mountains, you see them and you admire them. In a sense, they give you a challenge, and you try to express that challenge by climbing them.

It is indeed a matter of great difficulty to discover, and effectually to distinguish, the true motions of particular bodies from the apparent because the parts of that immovable space, in which those motions are performed, do by no means come under the observation of our senses.

Going to the woods is going home, for I suppose we came from the woods originally. But in some of nature’s forests, the adventurous traveler seems a feeble, unwelcome creature; wild beasts and the weather trying to kill him, the rank, tangled vegetation, armed with spears and stinging needles, barring his way and making life a hard struggle.

Tomorrow morning before we depart, I intend to land and see what can be found in the neighborhood.

There happen to be a lot of people around who spent an hour on the Internet and think they know a lot of physics, but it doesn’t work like that… There’s a reason there are graduate schools in these departments.

From the point of view of basic physics, the most interesting phenomena are, of course, in the new places, the places where the rules do not work – not the places where they do work! That is the way in which we discover new rules.

I love to travel, but hate to arrive.