The only way to find out if "magic" is not "magic", but something real...is to try it yourself until you either master it or prove its falsity. Many have achieved enlightenment either within or totally outside of the Christian faith. Therefore, I frankly doubt that there is only "one thing" that has to be done to achieve salvation...unless that one thing is to surrender the separately-minded ego that says to itself, "I am separate from God and separate from everyone else too". As long as you believe you are separate, then that is exactly what you experience, and you experience fear. You do not love without conditions, you make negotiated emotional deals that you consider advantageous. And that's the norm around here.

Accordingly, the enlightened are often viewed as mad or dangerous by normal society....should they decide to openly demonstrate their new awareness. That brings to mind St Francis of Assisi, who faced tremendous resistance on the part of family members and community, because he was demonstrating complete love of all beings instead of being sensible and going off to fight wars with the heathen, and make money, and gain political power, and get married, and all the usual stuff. :-) It's a wonder they didn't kill him.