Great Throughts Treasury

This site is dedicated to the memory of Dr. Alan William Smolowe who gave birth to the creation of this database.

Related Quotes

Sigmund Freud, born Sigismund Schlomo Freud

The reproaches against science for not having yet solved the problems of the universe are exaggerated in an "unjust and malicious manner; it has truly not had time enough yet for these great achievements. Science is very young—-a human activity which developed late.

Character | Psychoanalysis |

Simeon ben Azai, sometimes Ben Azai

A mitzvah causes another mitzvah and a sin causes another sin.

Arthur Conan Doyle, fully Sir Arthur Ignatius Conan Doyle

Is he not the celebrated author of The Dynamics of an Asteroid, a book which ascends to such rarefied heights of pure mathematics that it is said that there was no man in the scientific press capable of criticizing it?

Think |

Stephen Hawking

The same thing will happen with a wormhole, only with radiation instead of sound. As soon as the wormhole expands, natural radiation will enter it, and end up in a loop. The feedback will become so strong it destroys the wormhole. So although tiny wormholes do exist, and it may be possible to inflate one someday, it won't last long enough to be of use as a time machine. That's the real reason no one could come back in time to my party. Any kind of time travel to the past through wormholes or any other method is probably impossible, otherwise paradoxes would occur. So sadly, it looks like time travel to the past is never going to happen. A disappointment for dinosaur hunters and a relief for historians. But the story's not over yet. This doesn't make all time travel impossible. I do believe in time travel. Time travel to the future. Time flows like a river and it seems as if each of us is carried relentlessly along by time's current. But time is like a river in another way. It flows at diff?erent speeds in diff?erent places and that is the key to travelling into the future. This idea was first proposed by Albert Einstein over 100 years ago. He realized that there should be places where time slows down, and others where time speeds up. He was absolutely right. And the proof is right above our heads. Up in space. This is the Global Positioning System, or GPS. A network of satellites is in orbit around Earth. The satellites make satellite navigation possible. But they also reveal that time runs faster in space than it does down on Earth. Inside each spacecraft is a very precise clock. But despite being so accurate, they all gain around a third of a billionth of a second every day. The system has to correct for the drift, otherwise that tiny difference would upset the whole system, causing every GPS device on Earth to go out by about six miles a day. You can just imagine the mayhem that that would cause. The problem doesn't lie with the clocks. They run fast because time itself runs faster in space than it does down below. And the reason for this extraordinary e?ffect is the mass of the Earth. Einstein realized that matter drags on time and slows it down like the slow part of a river. The heavier the object, the more it drags on time. And this startling reality is what opens the door to the possibility of time travel to the future. Right in the centre of the Milky Way, 26,000 light years from us, lies the heaviest object in the galaxy. It is a supermassive black hole containing the mass of four million suns crushed down into a single point by its own gravity. The closer you get to the black hole, the stronger the gravity. Get really close and not even light can escape. A black hole like this one has a dramatic e-ffect on time, slowing it down far more than anything else in the galaxy. That makes it a natural time machine. I like to imagine how a spaceship might be able to take advantage of this phenomenon, by orbiting it. If a space agency were controlling the mission from Earth they'd observe that each full orbit took 16 minutes. But for the brave people on board, close to this massive object, time would be slowed down. And here the e?ffect would be far more extreme than the gravitational pull of Earth. The crew's time would be slowed down by half. For every 16-minute orbit, they'd only experience eight minutes of time. Around and around they'd go, experiencing just half the time of everyone far away from the black hole. The ship and its crew would be travelling through time. Imagine they circled the black hole for five of their years. Ten years would pass elsewhere. When they got home, everyone on Earth would have aged five years more than they had. So a supermassive black hole is a time machine. But of course, it's not exactly practical. It has advantages over wormholes in that it doesn't provoke paradoxes. Plus it won't destroy itself in a flash of feedback. But it's pretty dangerous. It's a long way away and it doesn't even take us very far into the future. Fortunately there is another way to travel in time. And this represents our last and best hope of building a real time machine. You just have to travel very, very fast. Much faster even than the speed required to avoid being sucked into a black hole. This is due to another strange fact about the universe. There's a cosmic speed limit, 186,000 miles per second, also known as the speed of light. Nothing can exceed that speed. It's one of the best established principles in science. Believe it or not, travelling at near the speed of light transports you to the future. To explain why, let's dream up a science-fiction transportation system. Imagine a track that goes right around Earth, a track for a superfast train. We're going to use this imaginary train to get as close as possible to the speed of light and see how it becomes a time machine. On board are passengers with a one-way ticket to the future. The train begins to accelerate, faster and faster. Soon it's circling the Earth over and over again. To approach the speed of light means circling the Earth pretty fast. Seven times a second. But no matter how much power the train has, it can never quite reach the speed of light, since the laws of physics forbid it. Instead, let's say it gets close, just shy of that ultimate speed. Now something extraordinary happens. Time starts flowing slowly on board relative to the rest of the world, just like near the black hole, only more so. Everything on the train is in slow motion. This happens to protect the speed limit, and it's not hard to see why. Imagine a child running forwards up the train. Her forward speed is added to the speed of the train, so couldn't she break the speed limit simply by accident? The answer is no. The laws of nature prevent the possibility by slowing down time onboard. Now she can't run fast enough to break the limit. Time will always slow down just enough to protect the speed limit. And from that fact comes the possibility of travelling many years into the future. Imagine that the train left the station on January 1, 2050. It circles Earth over and over again for 100 years before finally coming to a halt on New Year's Day, 2150. The passengers will have only lived one week because time is slowed down that much inside the train. When they got out they'd find a very diff?erent world from the one they'd left. In one week they'd have travelled 100 years into the future. Of course, building a train that could reach such a speed is quite impossible. But we have built something very like the train at the world's largest particle accelerator at CERN in Geneva, Switzerland. Deep underground, in a circular tunnel 16 miles long, is a stream of trillions of tiny particles. When the power is turned on they accelerate from zero to 60,000mph in a fraction of a second. Increase the power and the particles go faster and faster, until they're whizzing around the tunnel 11,000 times a second, which is almost the speed of light. But just like the train, they never quite reach that ultimate speed. They can only get to 99.99 per cent of the limit. When that happens, they too start to travel in time. We know this because of some extremely short-lived particles, called pi-mesons. Ordinarily, they disintegrate after just 25 billionths of a second. But when they are accelerated to near-light speed they last 30 times longer. It really is that simple. If we want to travel into the future, we just need to go fast. Really fast. And I think the only way we're ever likely to do that is by going into space. The fastest manned vehicle in history was Apollo 10. It reached 25,000mph. But to travel in time we'll have to go more than 2,000 times faster. And to do that we'd need a much bigger ship, a truly enormous machine. The ship would have to be big enough to carry a huge amount of fuel, enough to accelerate it to nearly the speed of light. Getting to just beneath the cosmic speed limit would require six whole years at full power. The initial acceleration would be gentle because the ship would be so big and heavy. But gradually it would pick up speed and soon would be covering massive distances. In one week it would have reached the outer planets. After two years it would reach half-light speed and be far outside our solar system. Two years later it would be travelling at 90 per cent of the speed of light. Around 30 trillion miles away from Earth, and four years after launch, the ship would begin to travel in time. For every hour of time on the ship, two would pass on Earth. A similar situation to the spaceship that orbited the massive black hole. After another two years of full thrust the ship would reach its top speed, 99 per cent of the speed of light. At this speed, a single day on board is a whole year of Earth time. Our ship would be truly flying into the future. The slowing of time has another benefit. It means we could, in theory, travel extraordinary distances within one lifetime. A trip to the edge of the galaxy would take just 80 years. But the real wonder of our journey is that it reveals just how strange the universe is. It's a universe where time runs at different rates in different places. Where tiny wormholes exist all around us. And where, ultimately, we might use our understanding of physics to become true voyagers through the fourth dimension.

Kill | People |

Stephen Charnock

The moral law is not properly a mere act of God’s will considered in itself, or a tyrannical edict, like those of whom it may well be said stat pro ratione voluntas: but it commands those things which are good in their own nature, and prohibits those things which are in their own nature evil; and therefore is an act of his wisdom and righteousness; the result of his wise counsel, and an extract of his pure nature; as all the laws of just lawgivers are not only the acts of their will, but of a will governed by reason and justice, and for the good of the public, whereof they are conservators.

Question | Spirituality |

Stefan Zweig

In chess, as a purely intellectual game, where randomness is excluded, - for someone to play against himself is absurd.

Knowledge | Race |

Stefan Zweig

Besides, isn't it confoundedly easy to think you're a great man if you aren't burdened with the slightest idea that Rembrandt, Beethoven, Dante or Napoleon ever lived?

Means | Need | Public | Stigma |

Thomas Berry

The success or failure of any historical age is the extent to which those living at that time have fulfilled the special role that history has imposed upon them.

Appreciation | Earth | Spirituality | Appreciation |

Thomas Boston

We are spiritually dead without the Spirit indwelling, and spiritually asleep without the Spirit influencing....The former, praying, is like a ghost walking and talking; the latter, like a man speaking through his sleep.

Day | Duty | Good | Grace | Man | Manners | Men | Sabbath | Time | Will | Worship |

Thomas Berry

In reality, there is a single integral community of the Earth that includes all its component members whether human or other than human. In this community every being has its own role to fulfill, its own dignity, its own inner spontaneity. Every being has its own voice. Every being declares itself to the entire universe. Every being enters into communion with other beings. In every phase of our imaginative, aesthetic, and emotional lives we are profoundly dependent on this larger context of the surrounding world.

Spirituality |

Thomas Brooks

In private prayer we have a far greater advantage as so the exercise of our own gifts and graces and parts that we have in public...in public duties we are more passive, but in private duties we are more active. Now, the more our gifts and parts and graces are exercised, the more they are strengthened and increased. All acts strengthen habits. The more sin is acted, the more it is strengthened. And so it is with our gifts and graces; the more they are acted, the more they are strengthened.

Earth | Enjoyment | Eternal | God | Happy | Imperfection | Men | Mourning | Pain | Present | Prison | Society | Weakness | Society | God |

Thomas Hobbes

The most noble and profitable invention of all other, was that of speech, consisting of names or appellations, and their connections; whereby men register their thoughts; recall them when they are past; and also declare them one to another for mutual utility and conversation; without which, there had been amongst men, neither commonwealth, nor society, nor contract, nor peace, no more than amongst lions, bears, and wolves.

Accident | Battle | Cause | Circumstances | Conscience | Fear | Life | Life | Man | Think |

Thomas Hood

Oh, if it be to choose and call thee mine, love, thou art every day my Valentine!

Good |

Thomas Jefferson

Say nothing of my religion. It is known to God and myself alone. Its evidence before the world is to be sought in my life: if it has been honest and dutiful to society the religion which has regulated it cannot be a bad one.

Health |

Thomas Mann, fully Paul Thomas Mann

A black pall, you know, with a silver cross on it, or R.I.P. — requiescat in pace — you know. That seems to me the most beautiful expression — I like it much better than ‘He is a jolly good fellow,’ which is simply rowdy.

Heart |

Thomas Jefferson

While prudence will endeavor to avoid this issue of war, bravery will prepare to meet it.

Day |

Thomas Merton

I refuse to be misled by any kind of a mirage about any alleged success of what I write. Those things are too easily exaggerated, and even when they are true, they always mean less than they seem to.

Bride | Heart | Love | Silence | World |

Thomas Merton

That is why advertising imagery which associated sexual fulfillment with all the most trivial forms of satisfaction–in order to separate the buyer from his dollar–creates a mental and moral climate that is unfavorable to genuine love. Unconsciously, the power that should go into creative and positive love for other person is being short-circuited by images of infantile oral fulfillment and other narcissistic symbols.

Spirituality |

Thomas Nagel

Even if life as a whole is meaningless, perhaps that's nothing to worry about.

Altruism | Justification | Man | Pain | People | Question | Reason | Wants | Understand |

Thomas Otway

Clocks will go as they are set, but man, irregular man, is never constant, never certain.