If we knew the internal and the external systems of the universe, we would realize that there can’t be any unpredictable actions. All of them are absolutely predictable. It is the same as looking at some small mechanisms, like molecules, or atoms, we can predict what will happen to them. So man, being a huge conglomerate of such small sub-systems, we’re still unable to calculate all his reactions, but in principle, it can be modeled quite accurately. So it’s just our ignorance of interconnections within this closed system of the entire universe that allows us to say that there is freedom of will in our behavior.
Our freedom of will is just a lack of knowledge. The true freedom of will consists in realization of all essential levels, actions, of thoughts, voluntarily seeing they are the most appropriate, natural, and wonderful things to do.
Courtesy of http://www.youtube.com/watch?v=3ZuJIr_uW3M