We need books. First, to be educated. Emerson knew Shakespeare by heart, and read widely in the classics and Eastern philosophers. He knew his world and he principles that governed it. The great thinkers begin by knowing what others think.
Wisdom comes after information and knowledge.
Books provide the scaffolding that allows us to build our own system of thought. In the end, our lives depend on that. We must think for ourselves. There is no precedent for you or me. Each of us is different from anyone else.