The library is a positive testament to human possibility because the library has everything you can imagine in it. A man has infinite possibilities, he can do anything he wants. Man can obtain an infinite amount of knowledge. On page 81, Borges states, “The number of orthographic symbols is twenty-five. This bit of evidence permitted the formulation, three hundred years ago, of a general theory of the Library and the satisfactory resolution of the problem which no conjecture had yet made clear: the formless and chaotic nature of almost all books," shows that if you put together all the letters of the alphabet, that would mean that you have everything. The books containing the information man seeks for contains the letters of the alphabet, which means you have everything you need in those books. The answer to mostly any question you may have is out there. All that you have to do it is search for the answer. The library contains answers regarding anything from the past, present, or future.
The library is a negative testament to human possibility because even if you search the answer to a question, does not always mean that you will find it. On page 82, Borges describes “All this, I repeat, is true; but four hundred and ten pages on unvarying MCV’s do not correspond to any language, however dialectical or rudimentary it might be. Some librarians insinuated that each letter could influence the next, and that the value of MCV on the third line of page 71 was not the same as that of the same series in another position on another page..” this says that on 400 pages on words there could be so many possible combinations of letters to put so many different words together but it will repeat information instead. There are so many types of books in the library of all types of topics in all different languages. It may take years to find a book that you may understand and when you do finally understand it, it may not be the answer you were looking for.