"Sometimes, deciding is simple. There is not much to think about when, for example, we are going to buy a can opener. Others, the process is complex and can become a major concern.
 Fortunately, prior knowledge and experience reorganize the brain circuits and streamline the decision-making process when they are complex, and the same happens with emotional mechanisms, which are much more powerful than previously thought" "In any case, this is, from choosing between toast with light jam or a slice of cake for breakfast, or between Madrid or Barcelona to live, the decision-making process brings into play numerous cognitive and emotional processes that are activated below the threshold of consciousness."