King Lear's growing perturbation becomes insanity the moment he sees the pretended madman Edgar.

Perturbation, they contended, is necessarily imperfection, and none of its forms can in consequence be ascribed to a perfect being.

"Every perturbation is a misery, but grief a cruel torment," a domineering passion: as in old Rome, when the Dictator was created, all inferior magistracies ceased; when grief appears, all other passions vanish.