I killed you! And you didn’t even notice! - Charles Stross

The Republic of Mhari contains five thousand times more cells than there are humans on earth, but is somehow both more and less than the sum of her parts. If all those cells die, then I am, by definition, dead. But the relationship between cell-citizens and the Republic of Me is less obvious than you might think.
At any point in time some of my cells are dying and being replaced, and the me that exist today consists almost entirely of different cells from the me of a couple of years ago—although I’m still me. But if you were to separate all my cells and then keep them alive in a mad scientist’s test-tube collection, I’d be dead, though all my bits live on. The Republic of Self can be dissolved, or taken over in a coup, or drastically reformed. I harbor this illusion of unitary identity—but in reality I’m what biologists call a superorganism, a swarm, and ensemble entity. I am not me: I am Hobbes’s Leviathan, or Leviathan’s Representative.

No plan of battle survives contact with the enemy, and time is the ultimate opponent.

Like the famous mad philosopher said, when you stare into the void, the void stares also; but if you cast into the void, you get a type conversion error. (Which just goes to show Nietzsche wasn't a C++ programmer.)