This passage from Dallas Willard’s book Knowing Christ Today has been a frequent companion as I try to practice these disciplines, thought I’d pass it on.
Among the practices that we learn to engage in to enable effectual focus upon Christ is a combination of solitude and silence. You have only to look at the lives of those most successful in living with Christ to see that this is so. To go into solitude means to be alone and do nothing for lengthy periods of time. That is necessary to break the grip of a God-alienated world over us at the level of our constant habits and preoccupations. Silence means to eliminate noise, including the noise of our own mouth. It further frees us to move into the life that is eternal. We need to combine solitude and silence on some occasions to gain their full effects. They must be practiced intensely and extensively. These are root-reaching practices that slowly bring us to an understanding of who and what we really are—often producing occasions of profound repentance—and that allow God to reoccupy the places in our lives where only he belongs. They require lengthy times and extreme intensity to do their work, though at the beginning we must ease into them in a gentle and non-heroic manner. Once established in our mind, soul, body, and social involvements, they go with us wherever we are and need to be renewed only periodically by special times of practice. Irritability and anger, loneliness and busyness, are signs that they need renewal. (Pp. 156-7)