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.
Where is the wisdom we have lost in knowledge? Knowledge gives us information. Wisdom gives us light on the way. Knowledge is skill. Wisdom is a quality. Knowledge can be learned. Wisdom can only be distilled from those places in life where knowledge is not enough to really explain what was happening to us, or information failed to resolve what was happening to the other.