A thought to fill the time until I find some to spare on posting...

Readers may be divided into four classes: 1. Sponges, who absorb all that they read and return it in nearly the same state, only a little dirtied. 2. Sand-glasses, who retain nothing and are content to get through a book for the sake of getting through the time. 3. Strain-bags, who retain merely the dregs of what they read. 4. Mogul diamonds, equally rare and valuable, who profit by what they read, and enable others to profit by it also.

-Samuel Taylor Coleridge, poet, critic (1772-1834)