The father of the Roman Catholic Jesuit Order -http://en.wikipedia.org/wiki/Ignatius_of_Loyola
As we read he received visions which were very weird and even from our Orthodox Christianity stand point satanic, however roman-catholics seen it as a sign of holiness.

He then traveled on foot[15] to the town of Manresa (Catalonia) and spent several months in a cave nearby [16] where he practiced rigorous asceticism. Ignatius also began experiencing a series of visions in full daylight while in hospital. These repetitive visions appeared as “a form in the air near him and this form gave him much consolation because it was exceedingly beautiful … it somehow seemed to have the shape of a serpent and had many things that shone like eyes, but were not eyes. He received much delight and consolation from gazing upon this object … but when the object vanished he became disconsolate”.