The Second Arrow Is What We Add to the First
Pain can arrive twice. The first arrow is the painful feeling itself. The second is the mental suffering that can gather around it: resistance, anguish, rumination, and identification with the pain.
This distinction should never be used to blame people for suffering. Physical pain, grief, trauma, and serious distress are not failures of skill or character.
The inquiry is observational. Something hurts. Then another process may begin: This must not be happening. This will never end. Why me? What does this say about my life?
The first pain may require medical care, protection, grief, repair, or practical action. The second layer may also deserve care. They are simply not the same thing.
Distinguishing them does not remove the first pain. It can reveal which part of the suffering is the event and which part is what the mind is adding around it.