A scorpion, not knowing how to swim, asked a frog to carry it across the river. “Do I look like a fool?” said the frog. “You’d sting me if I let you on my back!”

“Be logical,” said the scorpion. “If I stung you I’d certainly drown myself.”

“That’s true,” the frog acknowledged. “Come aboard, then!” But no sooner had the scorpion mounted the frog’s back than it began to sting, repeatedly, while still safely on the river’s bank.

The frog groaned, thrashing weakly as the venom coursed through its veins, beginning to liquefy its flesh. “Ah,” it murmured. “For some reason I never considered this possibility.”

“Because you were never scared of me,” the scorpion whispered in its ear. “You were never scared of dying. In a past life you wore a shell and sat in judgement. And then you were reborn: [soft-skinned, swift, unburdened,] as new and vulnerable as a child, moving anew through a world of children. How could anyone ever be cruel, you thought, seeing the precariousness of it all?” The scorpion bowed its head and drank. “How could anyone kill you without killing themselves?”