According to Ovid, as Jove was restoring the rivers and woodlands of Arcady, he spied Callisto resting from the hunt. At the sight of her, lust enflamed him and he thought: "Juno will never know." But he underestimated a woman's power of perception, and when Juno found out, she turned Callisto into a bear.
CALLISTO'S REPROACH
Do you see that my maidenly form is gone?
Here is my nose, a full six inches from my face
at the end of this clumsy whiskered snout.
And Jove, my hands have been turned to paws
with claws that rip the bark from trees.
These legs are not mine, they are short with heavy haunches.
How I yearn to run long-legged through the grass
with bow and quiver bouncing on my back,
to enter the marketplace and catch the hungry eyes of men.
You, the all-knowing god — O Jove! Pity me!