Imagine the outcry about the waste of tax-payers' money if it were known that the National Science Foundation were supporting research on time travel.  For this reason, scientists working in this field have to disguise their real interest by using technical terms like "closed timelike curves" that are code for time travel.
- Stephen Hawking

While every one of us is a time traveler, the cosmic pathos that elevates
human history to the level of tragedy arises precisely because we seem
doomed to travel in only one direction - into the future.
- Lawrence M. Krauss, The Physics of Star Trek

The distinction between past, present, and future is only an illusion, even if a stubborn one.
- Albert Einstein
 

Your "now" is not my "now."
- Charles Lamb, 1817
 

I see the Past, Present, and Future existing all at once before me.
- William Blake

We invent ordinary time so that we can describe the universe as a succession of events in time, rather than as a static picture, like a surface map of the earth.... Time is just like another direction in space.
- Stephen Hawking, Playboy, 1990
 

What I'm really interested in is whether God could have made the world in a different way: that is, whether the necessity of logical simplicity leaves any freedom at all.  - - Albert Einstein

The art of conversing with stones is called physics.  The question-and-answer periods of the conversations are called experiments.... The language spoken is mathematics.
- J. T. Fraser
 

"I take my accurate form," Memnoch continued, "when I am in Heaven or outside of Time."
- Anne Rice, Memnoch the Devil

I saw as God sees, and I saw as if Forever and in All Directions."
- Lestat, Memnoch the Devil
 

When Matter was created, so was Time.  All angels began to exist not only in heavenly perfection with God but to witness and be drawn into Time.
- Anne Rice, Memnoch the Devil
 

Imagine the chaos that would arise if time machines were as common as automobiles.... It would be impossible to take a simple census to see how many people there were at any given time.
- Michio Kaku, Hyperspace
 

It is interesting to note the curious mental attitude of scientists working on "hopeless" subjects.  Contrary to what one might at first expect, they are all buoyed up by irrepressible optimism.  I believe there is a simple explanation of this.  Anyone with out such optimism simply leaves the field and takes p some other line of work.  Only the optimists remain.
- Francis Crick
 

Existence is bound up with time.... Does time stand still, or does it flow? If it is in a state of flux, what is its speed? And since we measure speed by the ratio of traveling distance to the periodic motion of the clock, how are we supposed to measure the velocity of time? By time itself?
- Paul Hartal
 

Alas, for every gram of knowledge we have about wormholes, black holes, time warps, parallel universes, and the light-speed barrier, we have six metric tons of unanswered questions.
- David  Bauer, Implosion
 

The fairest thing we can experience is the mysterious.  It is the fundamental emotion which stands at the cradle of true art and true science.
- Albert Einstein, 'The World as I See It"
 

I don't think there's any question that a person could travel back in time while in a black hole.  The question is whether he could ever emerge to brag about it.
- Princeton physicist Richard Gott
 

Although most physicists today place the probability of the existence of tachyons only slightly higher than the existence of unicorns, research into the properties of these hypothetical FTL particles has not been entirely fruitless.
- Nick Herbert, Faster Than Light
 

If tachyons are one day discovered, the day before the momentous occasion a notice from the discoverers should appear in newspapers announcing "Tachyons have been discovered tomorrow."
- Paul Nahin, Time Machines
 

We all agree your theory is crazy; what divides us is whether it is crazy enough to be correct.
- Neils bohr
 

Among all creatures, humans are distinguished by the extent to which they wonder about things that do not immediately affect their subsistence.
- Lewis Carroll Epstein, Relativity Visualized
 

We cannot yet answer the ultimate questions, but we can discuss the questions intelligently.
- Alan Guth
 

Nothing happens in isolation.  We breathe and bleed, we laugh and cry, we crash and die in time with cosmic cues.
- Lyall Watson, Supernature