The Only Thing You Absolutely Have To Know Is The

The only thing that you absolutely have to know, is the location of the library.

The only source of knowledge is experience.

Intelligence is not the ability to store information, but to know where to find it.

Information is not knowledge.

We are in the position of a little child entering a huge library, whose walls are covered to the ceiling with books in many different languages. The child knows that someone must have written those books. It does not know who or how. It does not understand the the languages in which they are written. The child notes a definite plan in the arrangement of the books, a mysterious order, which it does not comprehend but only dimly suspects.

Never memorize something that you can look up.