Just as the doshas are the essential components of the body, the three Gunas- Satwa, Raja and Tamas – are the three essential components or energies of the mind. Ayurveda provides a distinct description of people on the basis of their manas (Psychological) Prakruti (constitution).
While all the individuals have mixed amount of the three, the predominant Guna determines an individual’s manas prakruti. In equilibrium, the three Gunas preserve the mind (and indirectly the body), maintaining it in a healthy state. Any disturbance in this equilibrium results in various types of mental disorders.