Anicca: Impermanence
Whatever is put together comes apart. The destroyer comes suddenly, and the suddenness carries the whole weight: a city standing for generations needs only an afternoon to fall. Walls, harvests, and children all arrive on the same terms, which is why news of one army from the north is news about everything you own.
Piyehi vippayogo dukkho: Parting from the loved is suffering
Separation from what is dear is one of the plain shapes of suffering. Mourning gets measured by an only son because that is the sharpest loss available, the one child with no second behind him. Love cuts the shape of the wound in advance: whatever is held closest is where the tearing will hurt most, so the size of the lamentation was set long before the danger appeared.
Parideva: Lamentation
Grief that breaks into sound. Bitter wailing is asked for openly here, and there is honesty in it, since sorrow pressed down keeps working underground while a cry at least tells the truth about what has been lost. The wailing remains a symptom rather than a cure, the way a fever announces an illness without touching it; sackcloth marks the wound, and something else has to heal it.
Maraṇasati: Mindfulness of death
Death kept in plain view rather than at the edge of sight. The mourning is ordered before the army has arrived, and that timing is the practice exactly: put on the sackcloth while the house still stands and everyone inside it is still breathing. Grief rehearsed early takes some shock out of the day it lands, the way fire drills are held in calm weather so people are already moving when smoke fills the hall.
Saṃvega: Urgency
The jolt that comes when your situation finally lands on you. Rolling in ashes puts the body into the position the heart has already taken, and dirt on the skin makes the danger impossible to argue away. Such a shock is meant to move you: a sleeper who wakes to the smell of smoke gets up, and the whole value of the alarm lies in the getting up.