Realization is the act of realizing something or the condition of having realized. Realization does not happen that easily and quickly in majority of the cases. For example, the idea of having wronged someone, acting hastily and impulsively, not giving best efforts to accomplish a goal etc. often dawns upon us when we are through and over an experience. It is often said that experience is the best teacher.
"Realization" can also be used to describe the accomplishment of one's goal or dream. The journey between dreams and their realization or accomplishment is purely desire. If you are interested in something, you will do what is convenient and if you are committed, you will do whatever it takes. Realization of any dream requires hard work and constant striving and perseverance to realize that dream. You cannot choose to give up if that dream means a lot to you and you feel that realizing the dream will give you great sense of accomplishment and satisfaction.