Our being is silent, but our existence is noisy. Yet when our noisy actions stop, there is a ground of silence always there. Contemplatives must be in contact with that ground and communicate from that level to keep silence alive for other people.
Mystical wisdom derives from an ardent desire to abandon normal intellectual functions so that divine insight may enlighten this ardor and add to it another fire, much stronger, which lifts the burning soul towards an even deeper wisdom.