Writing is a way of knowing.
Rather than merely recording facts and figures in prose form, astute writers actually learn something important about their subject matter and life in general. When I defend a thesis in an essay, I assume responsibility for the point(s) I am trying to convey. My writing is an expression of me, and in order for others to process it, my words/sentences/paragraphs must be devised carefully so that my readers may “see” my thoughts and determine if my ideas “make sense.” If my writing is fused with my thinking, I gain mastery over a small portion of knowledge, becoming an active member in the conversation of mankind. Not simply a discourse about something we know, writing is knowing.