Very few writers really know what they are doing until they’ve done it. This particular quote shows the base for the fundamental attitude a writer should possess. The quote shows people that writing is a form of art that needs no algorithm. It is just a free flow of expression.
You just let this childlike part of you channel whatever voices and visions come through and onto the page. This is another quote that emphasizes on the necessity of the carefree approach when it comes to writing. I believe this particular approach is necessary on order for writers to come up with a certain sense of creativity and a relaxed state of energy.
Just get it all down on paper because there may be something great in those six crazy pages that you would never have gotten to by more rational, grown-up means. The emphasis on the spontaneous recording of whatever you think of seems to have a plus point as you may find something in your spontaneous speech that will be of some help to you. A wonderful piece of writing that you never expected.
Almost all good writing begins with terrible first efforts. You need to start somewhere. Start by getting something — anything — down on paper. This statement strongly points out the importance of trusting in yourself and trusting the process. You need confidence to get yourself through the night to see the daylight.