You are sure about this?
Well, the buddhists believe all the world is in the imagination anyway.
But more to the point. All the heavenly bodies influence humans. The sun and the moon are directly reflected in the human body. The pineal gland in the brain responds to the solar 24hr cycle, secreting melatonin and affecting our sleep/wake consciousness. The pituitary gland below it in the brain responds to the lunar monthly cycle secreting hormones that modulate the sex cycle. Most people are somewhat vaguely aware of these two things. But, most people don't think of it as the SUN and the MOON within us.
Why did antient groups have fertility rites worshiping the moon? Well, they noticed that the moon determined human activity, it sort of predicted when humans would begin to feel frisky and be more prone to certain acts of excitement.
Scientists have dissected the brain, and figured out the connection between the glands, the biochemicals they produce, and the time cycles that link these biological, psychological, and sociological activities to the time cycles of the heavenly bodies of the sun and the moon.
That's as far as science has gotten us, however. But, the antient wize ones claim all the 7 major glands of the human body mirror the 7 major heavenly bodies, affecting our moods, our emotions, our consciousness, and our "imagination." And consequently determining what kind of activity we're likely to engage in "socially" when the planets align. Yeah, I know, we have more planets than 7 today, but in the old days they counted the 7 big objects in the sky they could see.
After a long time noticing human behavior they recorded their observation in a book:
"And God said, Let there be lights in the firmament of the heaven to divide the day from the night;
and let them be for signs, and for seasons, and for days, and years:" -- Genesis|1:14
So, the lights up there are for "signs".
We know when the human animal will feel frisky, because we monitor the lunar light and track the number of days from the last full moon.
Of course, we need to know a bit more about the individual, like birthday etc..because each person's lunar clock is out of step with the physical moon by a certain amount determined by that individual's peculiar characteristics. All humans don't come out on full moon like the frogs and frisk about and frolic at the same time. So, the lunar cycle is more hidden within the human species. Most men don't even know they have a cycle, while all women are aware of their loony nature.
Source:
http://blog.thirdeyehealth.com/chakra-chart-chakras-versus-endocrine-glands/
Source:
http://www.venusbuzz.com/articles_view.php?id=169
The antients called these cycles within us "chakras". A word that means "wheels", like the turning of the cycle, the repeating of events, each chakra is a clock. When the gears of two or more of these internal clocks align, the planets up there align, and special events are "portended." That doesn't mean something definite will happen, just that it is more likely to happen at that time than others.
The comet is just a long cycle. So long that it is even harder to find and observe the hidden link to human behavior. Just think, how many times does the same comet return again and again in a single person's lifetime? Making the connection to the sun and the moon was easy. The rest of the universe will have to wait until mankind advances enough to comprehend the links between the outer world and his inner world of mood, feeling, and imagination.
However, the antients tell us again that comets portend events that are equally rare in the normal course of hunan activity. Nostri's "horrible rout" is one such rare event, scheduled for the 2011 Aug-Sep comet. It doesn't mean it will happen, just that the human beings will be in the mood at that time for the "rout" to materialize. People will feel agitated and desirous of great change. Not only in Egypt. The comet is tugging at their insides. Stirring them up. It's all in their imagination, like you said. But, google, facebook, and twitter, are spreading the imagination of one to the imagination of the many, and the time is ripe for change in the outer world in certain places on earth like Egypt, so a confluence of coincidental events make the conditions ripe for the expression of the right seed in the fertile field.
Lets see what this comet does in Sept.