DALLAS WILLARD - The Spirit of the Disciplines
...silence is frightening because it's strips us as nothing else does, throwing us upon the stark reality of our life. It reminds us of death, which would cut us off from this world and leave only us and God. And in the quiet, what if there turns out to be very little to 'just us and God'? Think what it says about the inward emptiness of our lives if we must always turn on the tape player or radio to make sure something is happening around us.