Acharya Prashant explains that the ego cannot be controlled through action because the very desire to control it is an act of the ego itself. He points out that the ego thrives on external activity and change, but it avoids self-understanding. When one claims to have controlled the ego, it is merely the ego asserting its dominance under a new guise. The speaker emphasizes that the only way to dissolve the ego is through observation, attention, and awareness. He argues that the ego operates only when it is not understood; once its nature is seen clearly, it disappears without the need for effort.