Donald had reached its further edge, and could hear the rush of the stream from the deep obscurity of the abyss below, when there rose from the opposite side a strain of the most delightful music he had ever heard.
~ Hugh Miller
Knowledge is an unending adventure at the edge of uncertainty.
~ Jacob Bronowski
The comic novels I did when I was in my 20s had a harder edge - less sympathy for people. Or a sympathy that was harder to detect: Characters' foibles and obsessive bents were unrelenting, like caricatures.
~ Lydia Millet
Authority without wisdom is like a heavy ax without an edge, fitter to bruise than polish.
~ Anne Bradstreet