I think the shyness one feels in childhood is often overcome with time. There are children who hide behind their parents' legs, but you don't see grown-ups hiding behind people. It just doesn't happen. I mean, not that often. People develop social skills over time.
Susan CainShyness is inherently uncomfortable; introversion is not. The traits do overlap, though psychologists debate to what degree.
Susan CainOr at school you might have been prodded to come โout of your shellโโthat noxious expression which fails to appreciate that some animals naturally carry shelter everywhere they go, and that some humans are just the same.
Susan Cain