One old example of disobedience...and good guidelines, which I have also written on this blog before finding this...
http://www.mysticsofthechurch.com/2009/11/obedience-to-catholic-church-judging.html
The root cause of the ongoing deception: The necessity of spiritual direction and obedience The important missing element which allowed for the ongoing demonic deceptions in the life of Sr. Magdalena was the absence of a priest spiritual director to guide and discern her alleged mystical gifts and supernatural graces. Obedience is the "litmus test" of the Church, and it seems that Sr. Magdalena was never subjected to obedience to a spiritual director. Had she been, the demonic deceptions would certainly have been detected much sooner. Mystics and visionaries should always be guided by a priest spiritual director, and it should always be the priest who directs the mystic, and NOT the mystic who directs the priest. A priest spiritual director represents Christ and His authority within the Church, and therefore mystical and supernatural graces should be subjected to this authority to help discern their authenticity.
For sure another one of the spiritual lessons is that all that glitters is not necessarily gold, and the devil does not counterfeit tin or copper, or even silver---he seeks to counterfeit gold. So we need to be very careful, with the help of God, not to be misled by his phony deceptions. - See more at: http://www.mysticsofthechurch.com/2011/12/sister-magdalena-of-cross-nun-who-made.html#sthash.DPaahhyo.dpuf