In this unsettled age, when so many seek spiritual consolations, and so many fake seers and visionaries rise to meet this demand, it pays to re-examine the devil's most notorious deceits. Read here the story of Sr. Magdalene of the Cross, a 16th-century Spanish nun who, as a child, had entered into a pact with the devil and for decades had a lot of people going with her alleged miracles and prodigies. Even monarchs and high prelates were fooled.
There are many lessons to be drawn from the story of Sr. Magdalene of the Cross. First, we need to know our Faith well, so that we have a true yardstick against which to measure alleged marvels and revelations. Second, we need to remain in the state of grace, so that we have the divine assistance we need when our natural powers fall short. Third, we need to remain under the mantle of the Church's authority, which is instituted by God and is a sure protection against deceit, even when it leads us in directions not to our liking.
Fourth, we need to pray constantly.
Sancte Michael Archangele, defende nos in proelio; contra nequitiam et insidias diaboli esto praesidium. Imperat illi Deus; supplices deprecamur: tuque, Princeps militiae coelestis, Satanam aliosque spiritus malignos, qui ad perditionem animarum pervagantur in mundo, divina virtute in infernum detrude. Amen.