Appamāda: Heedfulness
Appamāda is watchful care that stays awake. "Be careful" here asks for steady eyes rather than the darting count of enemy campfires from the city wall. Ahaz is handed a job, not a sedative: keep looking, keep your footing, and let the looking itself be what holds you up.
Passaddhi: Tranquility
Passaddhi is the settling of a stirred-up body and mind. "Keep calm" lands on a king whose heart shook like trees in the wind, and shaking is exactly what makes two smoking sticks look like a wildfire. Let water go still and you can see the bottom of the pool; the stillness comes first and the seeing follows.
Bhaya: Fear
Bhaya is the mind's flinch before a threat. Fear does its damage long before Rezin's army arrives: the heart goes faint, the hands drop, and the city is half lost inside the king while every gate still stands. The command falls on the trembling, which is the part of the invasion already inside the walls.
Yoniso manasikāra: Wise attention
Yoniso manasikāra is attention that goes to the root of a thing. Fear had framed those two kings as fire; Isaiah measures them again as tails of smoke, torch stubs with the flame nearly gone. Same two men on the northern road, a different measure taken, and the whole size of the threat changes with the looking.
Dosa: Anger
Dosa is anger, one of the three roots that burn. "Fierce anger" is fire language, and fire eats its own fuel: the rage of Rezin against Judah is spending Rezin, hot now and ash soon. Anger burns the one carrying it first, which is why these two are smoking rather than blazing.
Anicca: Impermanence
Anicca is the passing nature of whatever arises. A torch burned down to a smoking stump has already announced its ending, since smoke is the sign a fire is finishing. From the wall these two kings fill the horizon, and they are still a pair of candles guttering in their own wax.