Brian Josephson Quotes

In relativity, movement is continuous, causally determinate and well defined, while in quantum mechanics it is discontinuous, not causally determinate and not well defined.

The bottom line is that time travel is allowed by the laws of physics.

I really believe that the aliens are us from the future. It seems to me a very plausible reason that explains a lot of phenomena as opposed to green men with one eye from outer space.

I find the whole time travel question very unsettling if you take it to its logical extension. I think it might eventually be possible, but then what happens?

Time travel offends our sense of cause and effect - but maybe the universe doesn't insist on cause and effect.

If time travel were possible, you still wouldn't be able to change the past - it's already happened!

Trust me: you make a movie about time travel, and you know for a fact humans will never travel through time. The paradoxes that come up just from trying to tell a story with time travel really illuminates the fact that it's impossible. It will never happen. We can barely get through a movie that involves time travel.

As Einstein himself pointed out. He said we’re like people in a boat without oars drifting along a winding river. Around us we see only the present. We can’t see the past, back in the bends and curves behind us. But it’s there.

If you put me in a real Tardis, I dread to think what would happen to the universe.

Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.

Travel at faster than the speed of light certainly can have dramatic implications that are difficult to understand, such as time travel.

There have always been arguments showing that free will is an illusion: some based on hard physics, others based on pure logic.

Originally, the burden of proof was on physicists to prove that time travel was possible. Now the burden of proof is on physicists to prove there must be a law forbidding time travel.

There are many of us thinking of one version of parallel universe theory or another. If it's all a lot of nonsense, then it's a lot of wasted effort going into this far-out idea. But if this idea is correct, it is a fantastic upheaval in our understanding.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Modern physics often advances only by sacrificing some of our traditional philosophical convictions

Apparently, some physicists argue that time is curved. I suppose this means that the past is in some way still present.

I can't even begin to grasp concepts like the multiverse.

To know the future absolutely it to be trapped into that future absolutely. It collapses time. Present becomes future.

Science rejects the indeterminate.

When you cut into the present the future leaks out.

If you could stop every atom in its position and direction, and if your mind could comprehend all the actions thus suspended, then if you were really, really good at algebra you could write the formula for all the future; and although nobody can be so clever as to do it, the formula must exist just as if one could.

The past is a kind of future that has already happened.

I did this movie, Predestination, and it's one of my favorite movies I've ever made, because sci-fi really lets you talk about ideas in a way that's not pretentious.

Don't Time travel into the past. You can't change it. Today it starts all over again. Every tomorrow is determined by every day.