The Virgin's words to the bride about how those who can see and hear and so forth escape dangers by virtue of the sunlight and so forth, but dangers befall those who are blind and deaf and so forth.
Book 3 - Chapter 9

The Mother speaks: "Although a blind man does not see it, the sun still shines clearly in splendor and beauty even while he is falling down the precipice. Travelers who have clear eyesight are thankful for the clear light that helps them avoid the dangers of their journey. Although the deaf man does not hear it, still the violent avalanche comes crashing down upon him terribly from on high, but he who can hear it coming escapes to safer places. Although a dead man cannot taste it while he lies rotting among worms, a good drink still tastes sweet. A living man can sip it and be glad at heart, feeling himself emboldened for any brave deed."