I believe that "Liber Primus is the way. Its words are the map, their meaning is the road, and their numbers are the direction." is a set of steps, first step was to attain liber primus, we got that. Second step is to make sense of the liber primus, we don't have that. The third step is to read it , we obviously can't do that yet. And the numbers part is probably referring to a book code given to us which will be used to find the next hint.