Psychology is concerned with the assessment, diagnosis, counseling, and treatment of people regarding mental health. The three theories discussed above have therefore endeavored to make a great contribution to increasing knowledge to solve mental health problems. Psychoanalysis has explored several thoughts and brought to light the aspect of the unconscious; there is the theory of behaviorism which explains the reasons why people behave in a certain way and finally the humanist theory which is essential in explaining the nature of human beings in the world.