Mental Mechanics explains how we think, how we learn and how we process the information we gather. We are only taught "rules" for processing two kinds of information, math and language. We are not taught rules for handling the information we use in emotions, needs, wants, values, self-esteem, relationships, parenting, or work. We teach ourselves and obviously don't do a good job. Mental Mechanics lays out really good rules to help us process our "data" in those aspects of our lives. More accurate thinking leads to significantly lower negativity and significantly better decisions.