In order to listen to God's silence we must escape the din of distractions that normally deafen us to it. Being deafened to the silence within as well as the silence without is corrosive to God-hearing. To be silent is to so empty oneself of the din of transitory distractions that one becomes fully receptive to the silence that always and everywhere underlies them. Silence is that state of spiritual sensitivity in which seekers make themselves available to the silence of God's voice.
When we are endowed with the Wisdom of the heart, but do not have access to knowledge, we are ignorant. Then we only believe what we see, or what has been proven to our satisfaction. Since it does not occur to us that we may be endowed with supernal wisdom, we do not open ourselves to the mystery of the Spirit that invisibly permeates the created world. So long as we limit our explorations and activities to the visible world as though that were all that existed, we must remain blind to the transcendent beauty of the eternal world.