In this article we will examine the differences between what is normal and abnormal psychological thinking, various disorders, and treatment methods for different disorders, with emphasis on therapeutic treatments. The idea of ​​first understanding what is the difference in the psychological thinking of an individual who suffers from a mental illness or disorder tends to lie in understanding what is normal and what is a abnormal behavior. Mental illness and mental disorders tend to be synonymous in their usage; many do not fully understand the difference between a disorder and an illness. Therefore, to begin this article, we will define the difference, before looking at any other aspect, in order to understand the different usage of these words. “When you're crazy, crazy like that, you don't know it. Reality is what you see. When what you see changes, moving away from someone else's reality, it remains a reality for you. (Hornbacher, nd) An illness is defined by the Merriam-Webster dictionary as “a state of ill health in your body or mind or a specific condition that prevents your body or mind from functioning normally: a disease” (2014). When we examine our understanding of a disorder, we find that the dictionary tends to define it as something that disrupts the normal order of treatment (2014). Therefore, we could conclude that a disorder is something that disrupts the normal order of your mind being able to process the information it receives, whereas a mental illness is something that actively prevents your mind from functioning normally . Looking at the different conditions within axes one and two, we find that we tend to see things that are on axis one tend to disrupt the normal order...... middle of paper .. ....iley & Sons Inc. Kurzweil, S. (2012). Psychodynamic therapy for depression in women with infants and young children. American Journal of Psychotherapy, 2(66), 181-199. Retrieved from http://search.proquest.com/docview/1285125572?accountid=458Lieb, K., Zanarini, M.C., Schmahl, C., Linehan, M.M., & Bohus, M. (2004). Borderline personality disorder. The Lancet, 364(9432), 453-461. Retrieved from http://search.proquest.com/docview/199002969?accountid=458Merriam-Webster Incorporated. (2014). Merriam-Webster Online Dictionary. (M.-W. Incorporated, producer) Retrieved from Merriam-Webster: http://www.merriam-webster.com/Walton, K., Roberts, B., Krueger, R., Blonigen, D. and Hicks, B. (2005). Capturing abnormal personality with normal personality inventories: An item response theory approach. Journal of Personality, 6(76), 1623-1648. doi:10.1111/j.1467-6494.2008.00533.x