Good question!  Some people may feel that after receiving a prediction one would be predisposed for the actual event to occur.  And I would often wholeheartedly agree!  Please read on...

But the question asked if the possibilities were limited by the prediction.  This is a very different question and deserves some explanation.

The responsible use of astrology allows us to predict (actually, I prefer the words anticipate or forecast) occurrences that are within the likely realm of probability.  If you're not new to my Web site you'll know that I focus a lot of attention on polarities -- the relatively wide range of possible responses to or manifestations of a particular measurement.

Each of the multitude of individual measurements has a fairly narrow range of anticipated effects varying from extremely positive to not at all positive.  This whole spectrum of manifestation still occurs within our initial expectations — but this is where the individual's free will comes into play.  Our conscious decisions, our level of motivation, and our environment or external factors all combine to determine what will actually happen in our lives.

For example, if there were a stressful measurement between Sun and Neptune in the Birth Chart, it suggests fairly specific tendencies.  But within these expectations there is a considerable latitude of expression — all of which still remain consistent with the specific measurement.  

This example would lead us to expect — at the extremes — self-deception, the need to escape, or unclear self-image on the less positive side contrasted to spiritual enlightenment or connectedness on the most positive side.  Given these choices, I'm sure we would all choose the spiritual enlightenment.  In reality, often what we observe is somewhere in the middle ground rather than the absolute extremes of anticipated expectations.  (For further discussion of this particular measurement, please see this month's Astrology Article, Escapism:  How to recognize it in the natal chart)

Although this example is oversimplified to make my point, I believe that the point is nonetheless quite valid.

By being aware of our overall potential — as suggested by the strengths and challenges in our horoscope and the most positive manifestations thereof — we can more readily envision ourselves striving for and attaining these more positive aspirations.

If someone has experienced only the less satisfying or more frustrating manifestations of a particular measurement, he or she may feel  locked in or doomed to endure this same influence throughout their entire life.  It is important to understand that this is not the case.  Fortunately, astrology has moved beyond the pre-destiny and inflexibility of such doom-and-gloom predictions.  It's never too late to change how we use all our tools.

Further, there are also times when it is important to be aware of some potential challenges or pitfalls as well as the more positive potentials.  The awareness of what might happen unless we take an active role in our own development can prove to be a powerful motivator, helping us to accomplish the more positive outcome.

I'm a firm believer that the more detail and structure we can give our dreams and visions for the future, the more likely they are to actually occur.  If we expect the worst, we often get it.  It's the old, "Be careful what you wish for..." saying.  But, on the other hand, if we allow and encourage ourselves to believe that a desirable outcome is realistic, it then becomes infinitely more attainable.

So in answer to the initial question, "Don't predictions limit possibilities?"  I would have to answer a resounding, "No!"  Working with a qualified astrologer, you should better comprehend your own individual strengths and challenges and how to best balance and integrate them.  As a result, the forecast or anticipated outcome is an enhanced possibility, and a highly beneficial one.  Then, being predisposed for this positive outcome to occur is terrific!