There’s this overemphasis on reusable software where you never get to open up the box. It’s nice to have these boxes but, almost always, if you look inside the box you can improve it and make work better once you know what’s inside the box. ~ Donald E. Knuth (Excerpt from Coders At Work.)

Second excerpt I posted from the book, Coders At Work that has so deep meaning.

Even though we use so many different libraries and APIs both lower and higher level, if we don’t know what these APIs and libraries do or how they work then, it’s just like using one of those anonymous black boxes with lots of magic.