When Alexander the Great founded the city of Alexandria, he sought to combine both the Egyptian and the Greek peoples (each of which were fully developed in terms of their cultural glory). He succeeded for a variety of reasons, creating a unique city that was the pinnacle of its day.
Creating a melting pot of knowledge was one of his primary goals, and aside from setting up a stunning academy (with hundreds of rooms each hosting 20 students and a professor) featuring the brightest minds in the Western world, he sought to compile all known written material into a single library.When these brilliant scientific and philosophical minds (who, among other things, first realized the world was round, and accurately calculated its circumference) gained access to these books and scrolls (which included all of those from the Far East and all points in between), and shared their ideas amongst each other, the achievements in understanding grew exponentially.
Key to this success was the access to the information contained within, from the complex and original ideas to new ways of understanding the world. Alexander knew that with access to multiple forms of thought (from all over the world), new depth could be added to almost any topic.
Though we all know how the story of the Great Library eventually ended (it burned), what we can gain from this story is the knowledge that the more we increase and diversify what we learn, the more we understand a subject completely.
For one of the few times in human history, virtually all of the written knowledge of the world is at our finger tips. We have but only to access it, to gain from it in a meaningful fashion rather than being absorbed into the flood of trivial information and constant stream of news.