Originally published in 1813, this early work by German philosopher Arthur Schopenhauer is both expensive and hard to find in its first edition. Originally published as his doctoral dissertation and then later re-published, it outlines his cornerstone arguments on the subject of knowing. This fascinating work is highly recommended for anyone interested in 19th century philosophy and its development. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.