Travelers at sea take soundings to measure the depth of the water through which they move. This kind of deep listening is necessary if they are to safely navigate treacherous waters. This is what we do as well, whenever we quiet ourselves and go to that inner place where there is enough silence for the words to resound.
A saint is a person who practices the keystone human virtue of humility. Humility in the face of wealth and plenty, humility in the face of hatred and violence, humility in the face of strength, humility in the face of your own genius or lack of it, humility in the face of another's humility, humility in the face of love and beauty, humility in the face of pain and death. Saints are driven to humbling themselves before all the splendor and horror of the world because they perceive there to be something divine in it pulsing and alive beneath the hard dead surface of material things -- greater and purer than they are.