We seem gradually to be groping toward an understanding of the world of subatomic particles, but we really do not know how far we have yet to go in this task.

True knowledge exists in knowing that you know nothing.

New knowledge is the most valuable commodity on earth. The more truth we have to work with, the richer we become.

I don’t know half of you half as well as I should like; and I like less than half of you half as well as you deserve.

You’ve got to invest in the world, you’ve got to read, you’ve got to go to art galleries, you’ve got to find out the names of plants. You’ve got to start to love the world and know about the whole genius of the human race. We’re amazing people.

Our treasure lies in the beehive of our knowledge. We are perpetually on the way thither, being by nature winged insects and honey gatherers of the mind.

The proper study of mankind is books.

Faith must trample under foot all reason, sense, and understanding.

The beginnings and ends of shadow lie between the light and darkness and may be infinitely diminished and infinitely increased. Shadow is the means by which bodies display their form. The forms of bodies could not be understood in detail but for shadow.

The infinite faith I have in people’s ability to understand anything that makes sense has always been justified, finally, by their behavior.

I think that man has a fundamental obligation to extract from himself and from the earth all that it can give; and this obligation is all the more imperative that we are absolutely ignorant of what limits – they may still be very distant – God has imposed on our natural understanding and power.

Nobody cares how much you know, until they know how much you care.

He who knows, does not speak. He who speaks, does not know.

Knowledge rests not upon truth alone, but upon error also.

My desire was not to pass any island without taking possession, so that, one having been taken, the same may be said of all.

Over the last 15 months, we’ve traveled to every corner of the United States. I’ve now been in 57 states? I think one left to go.

I’m 31 now. I think I’m beginning to understand what life is, what romance is, and what a relationship means.

I am not solicitous to examine particularly everything here, which indeed could not be done in fifty years, because my desire is to make all possible discoveries, and return to your Highnesses, if it please our Lord, in April.

All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?

Knowledge and human power are synonymous.

To know, is to know that you know nothing. That is the meaning of true knowledge.

We get the exciting result that the total energy of the universe is zero. Why this should be so is one of the great mysteries – and therefore one of the important questions of physics. After all, what would be the use of studying physics if the mysteries were not the most important things to investigate?

Effective communication is 20% what you know and 80% how you feel about what you know.

A queer fellow and a jolly fellow is the grasshopper. Up the mountains he comes on excursions, how high I don’t know, but at least as far and high as Yosemite tourists.

I believe that it is better to tell the truth than a lie. I believe it is better to be free than to be a slave. And I believe it is better to know than to be ignorant.

Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.

There is nothing so stupid as the educated man if you get him off the thing he was educated in.

There’s nowhere else like London. Nothing at all, anywhere.

Most damage that others do us is out of fear, humiliation and pain. Those feelings occur in all of us, not just in those of us who profess a certain religious or racial devotion.

Perplexity is the beginning of knowledge.

I love to travel, but hate to arrive.

Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not.

The truth of things is the chief nutriment of superior intellects.

U2’s best work has always been when we didn’t know what we’re doing.

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

Buy the ticket, take the ride.

Some like to think that a keen appreciation of art can actually make us better people – more just, more moral, more sensitive, more understanding. Perhaps that is true – in certain rare, isolated cases.

No group and no government can properly prescribe precisely what should constitute the body of knowledge with which true education is concerned.

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.

The man who does not read good books has no advantage over the man who cannot read them.

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

When we believe the best of people, we let go of each thing they do that is hurtful to us. And we choose to think things like, ‚I don’t believe they meant to hurt me.‘ ‚Maybe they’re having a bad day or don’t feel well.‘ ‚They probably don’t even realize how they sound.‘

Science is a way of thinking much more than it is a body of knowledge.

All the knowledge I possess everyone else can acquire, but my heart is all my own.

The finest works of art are precious, among other reasons, because they make it possible for us to know, if only imperfectly and for a little while, what it actually feels like to think subtly and feel nobly.

‚Thank you‘ is the best prayer that anyone could say. I say that one a lot. Thank you expresses extreme gratitude, humility, understanding.

Between the ages of fifteen and twenty-four, I must have read a whole library.

I do believe that in order to be a successful negotiator that as a diplomat, you have to be able to put yourself into the other person’s shoes. Unless you can understand what is motivating them, you are never going to be able to figure out how to solve a particular problem.

We as women, we have to understand that we know more, just even instinctively, than we think we do.

Experience without theory is blind, but theory without experience is mere intellectual play.

To know the laws is not to memorize their letter but to grasp their full force and meaning.

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.

I am not ashamed to confess that I am ignorant of what I do not know.

I need physics more than friends.

With all of their benefits, and there are many, one of the things I regret about e-books is that they have taken away the necessity of trawling foreign bookshops or the shelves of holiday houses to find something to read. I’ve come across gems and stinkers that way, and both can be fun.

The learned is happy, nature to explore; The fool is happy, that he knows no more.

If you deny people their own voice, you’ll have no idea of who they were.

Just as the system of the sun, planets and comets is put in motion by the forces of gravity, and its parts persist in their motions, so the smaller systems of bodies also seem to be set in motion by other forces and their particles to be variously moved in relation to each other and, especially, by the electric force.

The drawing teacher has this problem of communicating how to draw by osmosis and not by instruction, while the physics teacher has the problem of always teaching techniques, rather than the spirit, of how to go about solving physical problems.

I don’t pretend to understand the Universe – it’s a great deal bigger than I am.

Perhaps travel cannot prevent bigotry, but by demonstrating that all peoples cry, laugh, eat, worry, and die, it can introduce the idea that if we try and understand each other, we may even become friends.