It is good for women, especially, to be endowed with a soft blindness: to have mild, dim eyes, that never penetrate below the surface of things – that take all for what it seems: thousands, knowing this, keep their eyelids drooped, on system; but the most downcast glance has its loophole, through which it can, on occasion, take its sentinel-survey of life. I remember once seeing a pair of blue eyes, that were usually thought sleepy, secretly on the alert, and I knew by their expression – an expression which chilled my blood, it was in that quarter so wondrously unexpected – that for years they had been accustomed to silent soul-reading. 
Shirley – Charlotte Brontë