Meanings of own vitals in English

I stand in a desert, and feed on my own vitals; I must perish.

I would prefer a stab in my own vitals to a scratch on her finger!

Perchance hunger hath gnawed at his own vitals.

Why, then, devour your own vitals if I answer even as proudly, "I am black!"

Such a practice is worse than living from hand to mouth: it is living upon one's own vitals.

He needed next to nothing for his livelihood; people maintained that he never ate anything, but lived on his own vitals.

The backwoodsman, early settler, pioneer plainsman, mountain man were all like some infuriated beast of Promethean capabilities tearing at its own vitals.

Indeed, O king, those two brothers, in that battle, their own vitals pierced with shafts, pierced Satyaki of true deeds with their shafts.

Plassans, closed in and terror-stricken, gnawing at its own vitals within its prison-like walls, no longer knew what to imagine in order to frighten itself.

You will surely plunge the avenging sword into your own vitals if, by persecution, you vainly endeavour to wound the saints of the living God.