Truth is not always in a well. In fact, as regards the more important knowledge, I do believe that she is invariably superficial. The depth lies in the valleys where we seek her, and not upon the mountain-tops where she is found.
Source: The Murders in the Rue Morgue (1841).
-- Edgar Allan Poe, (Jan 19 1809-1849), US poet, short-story writer; He is famous for his mysterious, macabre stories and poems, e.g., The Gold Bug, 1843 and The Raven, 1845.