Most books are about aspects of human knowledge. Few people write books about human ignorance, despite the fact that there would be much more to write about.
It might be well for all of us to remember that, while differing widely in the various little bits we know, in our infinite ignorance we are all equal.
For it was my master who taught me not only how very little I knew but also that any wisdom to which I might ever aspire could consist only in realizing more fully the infinity of my ignorance
Dixxit 
