As long as the soul is not still there can be no vision, but when stillness has brought us into the presence of God, then another sort of silence, much more absolute, intervenes: the silence of a soul that is not only still and recollected but which is overawed in an act of worship by God's presence.
It is commonly considered rude to keep silent in the company of others, but voluntary silence connects rather than distances us from others whose individual differences temporarily fade away creating a shared feeling of harmony and oneness.