Thre were a couple quotes of Alexander Pope's in a book I was reading, (fools rush in where angels fear to tread, and, a little learning is a dangerous thing; Drink deep or taste not the Peirian Spring) and then as seems to often happen, I came across a few more while reading something online. All this led me to his An Essay on Criticism. It's in the public domain, so I'm reading it on Open Library.