I've found though observing leadership expert Orrin Woodward that the path to clear and uninhibited thought lies in the ability to apply the information not only from the individual books one learns from, but when the concepts of the teachings of several authors are combined.
Example: We recommend everyone read the top five books. Each one individually is an eye opening experience, but combined they provide you the information to change your life. The input, when assembled creates the ability to think at another level. Orrin has just recently advised me that he knows exactly when a member of the TEAM leadership community is ready to assume the highest level of leadership in our organization. That realization is when they stop asking him questions whose answers are provided in those top five books. For me that meant that I need to be capable of citing them chapter and verse.
This isn't the only example. I've found if you understand the concepts of mob mentality introduced to us by Gustave Le Bon in his writing, "The Crowd," and enhance that information with "Democracy in America," by Alexis De Tocqueville, you'll gain a unique understanding of how factions of this country are using class warfare, and the indoctrination of the masses to undermine our freedoms.
Combining information sources brings the picture into a clearer focus. Each article you read adds value to your ability to form the picture, but introducing a combination of input will bring you to a higher level. It creates a thought process the average individual avoids, and in itself brings you to a level of exceptionalism. It's like the difference between monolithic sound and theater quality surround sound, and the realization of it is an Aha moment! It's akin to owning the knowledge and the difference when you apply it.