Dzongsar Jamyang Khyentse Rinpoche in the article Do Nothing from the Winter 2009 issue of Tricycle: The Buddhist Review:

Meditation is one of the rare occasions when we’re not doing anything. Otherwise, we’re always doing something, we’re always thinking something, we’re always occupied. We get lost in millions of obsessions or fixations. But by meditating – by not doing anything – all these fixations are revealed. Beginners might find this a little frightening, but slowly they will gain inner confidence, and these fixations will automatically lessen. The classical meditation instruction texts say our obsessions will undo themselves like a snake uncoiling itself.