What three stages of treatment are used in the Ministry of Love and what does O'Brien say the Party seeks above all else?

In chapter 3 of part 3, O'Brien tells Winston of the three stages of Winston's reintegration: "There is learning, there is understanding, and there is acceptance."  He means that first, the Party will drill their "truths" into a prisoner's head through torture, then by ending the torture (it is here that Winston comes to love O'Brien because he stops the torture), the prisoner will come to understand that Big Brother and the Party will take care of him, and finally, the acceptance is when the prisoner actually and completely believes everything that Big Brother and the Party tells him.  Above all else the Party, according to O'Brien, is more interested in the thought than they are in the deed.  They are after control of thoughts because they know that if they can control people's thoughts, then they can easily control the "overt act".