To Be Wise, Unlearn
For the modern mind, perhaps even more than any mind that came before, the first step to authentic understanding and learning is to absolutely empty one's mind of all supposed knowledge. We are filled with so many prejudices about the past that we are, unless serious effort is made, positively unable to see what came before us. Do not say "I will read the thoughts of men who lived in a dark age of unenlightened dogmatism and uncritical gullibility," say rather, "I will read the thoughts of men who lived upon this earth as I have lived upon this earth, and I will seek to understand what they are saying as they would have me understand it." This is the beginning of the path to Truth.