To repeat means to condition ourselves to remember more often our dreams. If you often remember, then slowly the dream will be embedded in the subconscious mind. When the message has been received by SCM (sub conscience mind), then he will move ourselves to make decisions or make us more creative.
If the seeds of thought, ideals, and dreams more often in the imagination can actually multiply the power of the subconscious mind. This repetitive imagination will indirectly stimulate the illusion of the extraordinary reality of our potential as a human being. So that we will strive to achieve the dream visualized. That's how the power of the subconscious mind works and is resurrected, until a major change takes place within us at a time.
It is not real, but it will have a tremendous impact on your life if your mind is conditioned as described above.
Without repetition, the law of attraction would not be possible. The Law of Repetition plays an important role. Without it, the brain will not reach the "genius" level and the muscles will not reach the "special reflex" level of speed and accuracy.