Psychology is an exact science that deals with the study of the human mind and behavior. To sum it up, psychology is the study of mental functions and processes. Also, of inner and subjective experiences, we can mention thoughts and emotions. In addition, we can also mention consciousness, motivation, perception of others and personality.
People started to consider psychology an independent discipline. At the same time, different currents and different orientations have developed. They depended on the conceptions of the respective psychologists.
As in any branch of science that has sprung from philosophy, people have not left alone purely philosophical issues about the nature of the spirit. Moreover, they are even leading to the emergence of a philosophy of spirit.