Arjuna continues to describe what is happening to him: "My limbs are failing. My mouth is parched. My whole body is trembling. My hair is standing on end." One symptom after another, each worse than the last — as if his body is shutting down piece by piece.
Consider this: Arjuna has fought hundreds of battles and never once lost his nerve. He has faced celestial warriors, divine weapons, and impossible odds without flinching. The trembling is not from any ordinary fear. It comes from a place far deeper — the horror of raising weapons against the people who raised him.
Romaharsha — the hair standing on end — is the body's response to something overwhelming, whether awe or dread. Arjuna's entire body is rebelling against what his duty demands. His limbs, his mouth, his skin, his nerves — all of them are saying the same thing: I cannot do this.