Resistance is usually ascribed to bodies at rest, and impulse to those in motion, but motion and rest, as commonly conceived, are only relatively distinguished; nor are those bodies always truly at rest, which commonly are taken to be so.

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

As a tactic, violence is absurd. No one can compete with the Government in violence, and the resort to violence, which will surely fail, will simply frighten and alienate some who can be reached, and will further encourage the ideologists and administrators of forceful repression.

The greatest progress is in the sciences that study the simplest systems. So take, say, physics – greatest progress there. But one of the reasons is that the physicists have an advantage that no other branch of sciences has. If something gets too complicated, they hand it to someone else.

I am well aware that there are prisoners of conscience in the Soviet Union, including some who have said they have chosen to resist the law because of religious reasons.

The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.

I have no trouble sleeping.

At fifteen life had taught me undeniably that surrender, in its place, was as honorable as resistance, especially if one had no choice.

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

If we are to be happy, we must first react against our tendency to follow the line of least resistance, a tendency that causes us either to remain as we are, or to look primarily to activities external to ourselves for what will provide new impetus to our lives.

The purpose of a vacation is to have the time to rest. But many of us, even when we go on vacation, don’t know how to rest. We may even come back more tired than before we left.

Anybody can observe the Sabbath, but making it holy surely takes the rest of the week.

The ancients considered mechanics in a twofold respect: as rational, which proceeds accurately by demonstration, and practical. To practical mechanics all the manual arts belong, from which mechanics took its name.

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.

It always seems odd to me that the fundamental laws of physics, when discovered, can appear in so many different forms that are not apparently identical at first, but, with a little mathematical fiddling, you can show the relationship.

OK, so what’s the speed of dark?

The reason men oppose progress is not that they hate progress, but that they love inertia.

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.

Experience acquired in the heroic battle against Batista’s tyranny showed that the enemy, no matter what his strength, could not defeat the Cuban people.

It’s very important that we re-learn the art of resting and relaxing. Not only does it help prevent the onset of many illnesses that develop through chronic tension and worrying; it allows us to clear our minds, focus, and find creative solutions to problems.

I can calculate the motion of heavenly bodies, but not the madness of people.

You have a row of dominoes set up; you knock over the first one, and what will happen to the last one is that it will go over very quickly.

Science is beautiful when it makes simple explanations of phenomena or connections between different observations. Examples include the double helix in biology and the fundamental equations of physics.

It is reasonable that forces directed toward bodies depend on the nature and the quantity of matter of such bodies, as happens in the case of magnetic bodies.

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

I need physics more than friends.

The observer, when he seems to himself to be observing a stone, is really, if physics is to be believed, observing the effects of the stone upon himself.

There were several possible solutions of the difficulty of classical electrodynamics, any one of which might serve as a good starting point to the solution of the difficulties of quantum electrodynamics.

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.

If you are in a spaceship that is traveling at the speed of light, and you turn on the headlights, does anything happen?

It should be possible to explain the laws of physics to a barmaid.

They say the universe is expanding. That should help with the traffic.

I think you should always bear in mind that entropy is not on your side.

The community stagnates without the impulse of the individual. The impulse dies away without the sympathy of the community.

Gravity may put the planets into motion, but without the divine Power, it could never put them into such a circulating motion as they have about the Sun; and therefore, for this as well as other reasons, I am compelled to ascribe the frame of this System to an intelligent Agent.

The motions which the planets now have could not spring from any natural cause alone, but were impressed by an intelligent Agent.

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.

Sleep, that deplorable curtailment of the joy of life.

In order to arrive at knowledge of the motions of birds in the air, it is first necessary to acquire knowledge of the winds, which we will prove by the motions of water in itself, and this knowledge will be a step enabling us to arrive at the knowledge of beings that fly between the air and the wind.

It is theoretically possible to warp spacetime itself, so you’re not actually moving faster than the speed of light, but it’s actually space that’s moving.

There is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics.

Well, we know that people in Australia love the idea of both Impulse and Virgin Blue getting up and adding a bit of competition, and it’s fun to be able to deliver it.

Cuba has become a symbol of courageous resistance to attack. Since 1959, Cuba has been under attack from the hemispheric superpower.

I think the discovery of supersymmetric partners for the known particles would revolutionize our understanding of the universe.

Painting is concerned with all the 10 attributes of sight; which are: Darkness, Light, Solidity and Colour, Form and Position, Distance and Propinquity, Motion and Rest.

Peoples do not defy repression and death, nor do they remain for nights on end protesting energetically, just because of merely formal matters.

Nothing is softer or more flexible than water, yet nothing can resist it.

I think equation guessing might be the best method to proceed to obtain the laws for the part of physics which is presently unknown. Yet, when I was much younger, I tried this equation guessing, and I have seen many students try this, but it is very easy to go off in wildly incorrect and impossible directions.

The power of the white world is threatened whenever a black man refuses to accept the white world’s definitions.

I love sleep; it’s my favorite.

Chemistry, until my childhood, not that long ago, was regarded as a calculating device. Because you couldn’t reduce to physics. So it’s just some way of calculating the result of experiments. The Bohr atom was treated that way.

If a projectile were deprived of the force of gravity, it would not be deflected toward the earth but would go off in a straight line into the heavens and do so with uniform motion, provided that the resistance of the air were removed.

It now appears that the way the universe began can indeed be determined, using imaginary time.

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.

The lies of the empire and the treason of the quislings shall be defeated.

Sleeping is no mean art: for its sake one must stay awake all day.

Man can be understood only by ascending from physics, chemistry, biology, and geology. In other words, he is first of all a cosmic problem.

An object in motion tends to remain in motion along a straight line unless acted upon by an outside force.

My first popular book, ‚A Brief History of Time,‘ aroused a great deal of interest, but many found it difficult to understand.

Proper sleep has helped me get to where I am today as an athlete, and it is something that I continue to rely on every day.

I’ve proved to be as difficult to convert as I am to hypnotize.