While the Syntopicon ultimately appears in book form, one must recall that it started life as a paper slip-based card index (Life v24, issue 4, 1948). This index can be queried in some of the ways one might have queried a library card catalog or more specifically the way in which Niklas Luhmann indicated that he queried his zettelkasten (Luhmann,1981). Unlike a library card catalog, The Syntopicon would not only provide a variety of entry places within the Western canon to begin their search for answers, but would provide specific page numbers and passages rather than references to entire books.

The Syntopicon invites the reader to make on the set whatever demands arise from his own problems and interests. It is constructed to enable the reader, no matter what the stages of his reading in other ways, to find that part of the Great Conversation in which any topic that interests him is being discussed. (p. 85)

While the search space for the Syntopicon wasn't as large as the corpus covered by larger search engines of the 21st century, the work that went into making it and the depth and focus of the sources make it a much more valuable search tool from a humanistic perspective. This work and value can also be seen in a personal zettelkasten. Some of the value appears in the form of having previously built a store of contextualized knowledge, particularly in cases where some ideas have been forgotten or not easily called to mind, which serves as a context ratchet upon which to continue exploring and building.