Sight is not absolutely essential in this process, but we use sight because it is the dominant sense. It's easiest to interrupt the flow of thought in sense perception and move the mind beyond sense perception with sight.
Frederick LenzYou can measure your power in your ability to stop thought. The longer you can stop thought, the more powerful you are.
Frederick LenzThe kundalini is the life force; it is the essential energy of existence. It is the hidden ingredient in life. It is what makes it all work.
Frederick Lenz