When reading about the four Functions of Mind, it can sound like this is merely an intellectual study. It is not. Witnessing the four Functions of Mind is an important part of Yoga meditation.
Observing and discriminating between the Four Functions of Mind is a key to self-realization.
Discriminating between the four functions : This is one of the most profound self-awareness practices of the ancient Himalayan sages. This Yoga practice is just as profoundly useful today as it was thousands of years ago. the process is one of self-observation, and gradually discriminating between these four aspects of the innet instrument, so as to attain the direct experience of the Center of Consciousness from which all of our thoughts, emotions, and experiences arise on various degrees and grades.