How does Wolfram Von Eschenbach use imagery in Parzival?

Imagery:

'If you wish to make something fine and truly noble of your life, never vent your anger on women. Women and priests are grouped together as unarmed: but God's blessing is outstretched over the clergy alone. The latter you should serve faithfully in hope of a good ending: you must place your trust in the clergy. Nothing you see on earth is like a priest. His lips pronounce the Passion that nullifies our damnation. Into his consecrated hand he takes the highest Pledge ever given for debt. When a priest so guards his conduct that he can perform his office chastely, how could he lead a life more holy?'"