Ecclesiastes 8:8 stands at the deathbed and finds nothing held in human hands.
Anicca: Impermanence.
Nothing you hold stays held for long. The breath shows it plainly: you breathe one out and cannot order it back, so the spirit was never a possession to retain, only a guest already leaving as it arrives. Each breath that goes and does not return is the day of death in miniature, rehearsed thousands of times before the final one, until sitting with that flow loosens the grip that made its loss feel like robbery.
Anattā: Not-self.
Behind the breath, no owner sits holding the reins. The wish for power over the spirit to retain the spirit assumes someone inside who could give that order, yet searching for the holder turns up only breathing that happens on its own, like a river no one is pushing. Losing the day of death from your hands stops feeling like theft once it is clear there was never a hand there to be robbed.
Maraṇasati: Mindfulness of death.
This keeps the day of death in plain and steady sight. Since no one holds power in the day of death, the level-headed response is to quit bargaining for that power and keep the appointment in view instead. Its hour is both certain and hidden from your calendar, and holding those two facts together is what turns an ordinary morning into borrowed, valued time.
Māra: The lord of death.
Picture death as a besieging army, and "no discharge in that war" names the siege exactly: a campaign that grants no soldier leave and accepts no bribe of extra years. Kings and beggars wait in the same line before him, none pulling rank, none buying a pass. The single ground his troops cannot take is a mind that has already put down its clinging, which is the one furlough offered in that war.
Kamma: Action and its fruit.
Deeds ripen into what later befalls the one who does them. "Wickedness shall not deliver those that are given to it" states the law flatly: a bribe of evil buys no exemption from the fruit of evil, since the deed and its result cannot be pried apart. Those given to wickedness stay bound by their own actions, which follow them home the way the cart follows the ox that pulls it.