Source : http://www.dreamviews.com/whatislucid.php
Definition
There is nothing inherently difficult to understand about the concept of lucid dreaming: lucid dreaming is simply dreaming while being aware you are dreaming. You can think of lucid dreaming as being conscious while dreaming. If, by chance, during a dream it suddenly dawns on you that you are dreaming, then you have experienced a lucid dream, regardless of whether you have been able to attain control of your dream. Lucid dreaming is usually induced by some sort of cue —something that indicates to the person that what he or she is experiencing is a dream, and not reality. Cues, however, are not necessary for becoming lucid: sometimes people spontaneously become lucid without noticing anything strange or typical of dreams. Lucid dreaming is a very simple concept but for most it will take patience and determination to achieve.
Many people seem ignorant of the distinction between having a lucid dream, and controlling a dream. Being able to freely control one’s dream does not directly follow becoming lucid: one can have a lucid dream without any control whatsoever. Controlling your dream is simply proceeding to the next level, by attempting to exert your will upon your surroundings.
Misconceptions
Since lucid dreaming is a relatively unknown phenomenon, there are a number of misconceptions that encompass it:
Lucid dreaming is new-ageish.
As stated in the introduction, many people when first introduced to the concept dismiss it as being bizarre and too “new-ageish.” In reality, lucid dreaming is whatever you want it to be—because, after all, they are your dreams—and does not necessarily fall under the stigma of “new-age.” This site offers a very practical examination of lucid dreaming along with practical reasons for why one would want to endeavour to induce lucid dreams.
Lucid dreaming advocates escapism.
Another misconception is that lucid dreaming advocates escapism. This site, by no means whatsoever, condones escapism. Lucid dreaming occurs while you are sleeping; it is not meant at all to infringe upon your involvement in the real world. Indeed, reading a book or watching a movie will take you out of the “real world” more than lucid dreaming will. The idea that lucid dreaming advocates escapism is valid only when one attempts to sleep more in order to induce lucid dreams. This site only suggests that one maintain a healthy sleep pattern to promote lucid dreams—an average of 7 or 8 hours a night is recommended.
Lucid dreaming is unnatural, involves "dark arts," or is occult related?
Some misguided people immediately assume lucid dreaming must be a corrupt practice; this is just plain silly. Denunciations such as this are the direct result of fear of the unknown—this site hopes to dispel such ignorance. There is nothing inherently wrong or questionable with lucid dreaming; instead, there are many positive reasons to practice it. People who believe otherwise should first read about it before forming an opinion.
Dreams contain messages that are lost with lucid dreaming.
Finally, many people take an intransigent stance against lucid dreaming based on their belief that our dreams are trying to tell us something, and we lose those messages by trying to alter our dreams. That’s a reasonable position to take, however, that idea is not entirely valid. First of all, most people that endeavour to have lucid dreams only have them occasionally—perhaps a few times a month. Some obviously will have them more often (perhaps several times a week or even in a night) but again for the most part, on average, those who attempt lucid dreaming still have more non-lucid dreams than lucid ones. Perhaps even more valid a point is that becoming proficient at lucid dreaming demands excellent dream recall. Thus, while practicing to become lucid in dreams you are also increasing your ability to remember your dreams, which as a by-product will provide you with more memorable dreams to sift through in search of hidden insight. Therefore one can practice lucid dreaming and still attain enough “regular” dreams so that he or she need not worry about losing something important.
Levels of Lucidity & Dream Control
Lucid dreaming was defined as becoming aware you are dreaming; the actual level of awareness varies, however. When the level of lucidity is high you are well aware that nothing you experience is real, and you realize that you have nothing to fear—you cannot be harmed by any situations that may seem precarious. With low-level lucidity, although partially aware you are dreaming, you are not aware enough to have a great impact on your dream—you may accept some aspects of your dream that you would not normally accept in the ordinary world (you may not find it at all strange that your dog flies around the living room, etc.) With low-level lucidity your realization may also quickly fade and you may accept the whole dream as reality.
Again, attaining lucidity does not immediately mean you’re in control of your dreams. As we’ll discuss later a lot of practice is necessary in order to exert and maintain control. Obviously you have the best chance of controlling your dreams with a high-level of awareness, but even then it may not be possible to exert much control, at least, at first. Although experience plays a part in how well you can control your dreams, your own belief and confidence is key. If you lack confidence in your dreams, you may fail at controlling them—if you believe in a dream that you cannot do something, it is very likely that you won’t be able to.
Instead of changing the dream, however, you could merely control your own behaviour. This kind of dream control is most beneficial during nightmares. Rather than attempting to change the dream, you can change your own attitude. By realizing it is merely a dream and that you cannot sustain physical damage, you can allay your fear, which is the only real part of the nightmare. Changing your attitude in such a manner usually transforms the nightmare into something more peaceful as well. Defeating nightmares is only one of many reasons to attempt to have lucid dreams.