Jonathan Swift's comment that "It is better that a language should not be wholly perfect than that it should be perpetually changing" seems more quaint and extraordinary than ever.
Because the uninsured are a "perpetually changing group," however, a much larger fraction of the population suffers periodic, terrifying spells of being uninsured, and an even larger fraction lives with the fear of losing insurance if anything goes wrong at work or at home.
The synaptic architecture of all of the connections between neurons in an individual's brain is a perpetually changing state that results from a combination of early development; nonstop, experience-dependent change; and the unique set of genetically determined protein receptors mediating attention, motivation, and memory in that individual (for an overview, see Eshel [2007]).
Organisms do not spend most of their time adapting to rocks; they are perpetually challenged by, and adapting to, a rapidly changing suite of viruses, parasites, predators, and prey.
Weather, one of the most potent forces in our lives, is often imperceptible, perpetually changing, and frequently mysterious.
Mtahabwa (2007) adds that ZPD is the hypothetical, perpetually changing region in the child's mental realm as a result of the learning process defined by what the child can accomplish independently from what can be done only through help from adults or competent peers in a cultural group.
And dancegoers are perpetually curious.
Boundaries and distributions are perpetually shifting.
Some successful performers are perpetually on, and some are just perpetually pushing.
