The Gunas: 101
In Yoga Psychology, the Sankhya Karika describes how the universe is divided into Prakrit (Nature) and Purusa (Spirit). The qualities of Purusa are the same as the qualities of the Self. To deal with the material reality or Prakriti there are three constituents: Budhi, Ahamkara, and Manas.
This cognition of Buddhi, Manas, and Ahamkara or Ego also follow along with the five sensory faculties of vision, taste, smell, hearing, and touch. The senses are higher than the body and the mind more elevated than the senses; above the mind is the intellect, and above the intellect is the Atman (BhG 3:42). Buddhi is our intellect or faculty of knowing and it relates to vijananamaya kosha ; it is our discriminative wisdom, the ability to witness our experiences. Ahamkara or Ego provides identity to our function but also creates our feelings of separation, pain, and alienation. Mana (the mind) is an organ of storage, analysis, and intentionality, and it operates in conjunction with the five senses. Our ego forms attachment to thought patterns (Chitta) instead of connecting to the higher qualities of the mind; which has the ability to experience pure consciousness. The application of knowing all this will be to understand the qualities of the mind and the common interactions of mistaken identity that can happen or develop from habits.