As promised, I said I would write about the joy of writing, so I will.
If you've ever experienced putting words together in a way that perfectly conveys your feelings, then you know the joy of writing.
If you've ever written something that evokes strong emotions, then you have learned how to use the written word to make a connection with another person.
If you've ever made an argument on paper that is so persuasive that it forces another to examine his or her views, then you understand the power of the written word.
If you feel compelled to write even if no one else ever sees your words, simply for the fulfillment it brings to you and you alone, then you are a writer.