Acharya Prashant distinguishes between the voice of the soul and the calculations of the ego. He explains that the soul indicates whether an action is right or wrong in the present moment without providing reasons, logic, or future projections. If a person feels a spontaneous inclination or hesitation without a cause, it is the soul. Conversely, if one judges an action based on its potential future consequences or results, it is the ego-driven mind. The ego views every action through the lens of profit and loss, whereas the soul acts naturally and immediately without seeking justification.