the idea of being invisibly alone in a crowd of strangers is so tempting for a number of introverts...or maybe for loneliness? - Jennifer William
Her own mother lived the latter years of her life in the horrible suspicion that electricity was dripping invisibly all over the house. - James Thurber
Told often enough that they are the source of sin, women may well begin feeling guilty as they accept the necessity for penance. Taught effectively enough that they are irrelevant to the important processes of society, women begin to feel they are living invisibly. - Sandra M. Gilbert Susan Gubar