There was a case of a reported apparition of Mary that I went to check out one time. It was pretty benign and as such seemed possibly legit. Then one day “Mary” started to reveal things and give instructions found nowhere in the Tradition of revelation already presented to us. At that point, I knew to pack my bags and enjoy prayer time elsewhere.
It is our dogmatic teaching that all revelation ended with the death of the last apostle. (That doesn’t mean we might not discern a truth by contemplating more deeply truths already revealed to us along the lines of contemplating 2 + 2 and coming with the answer 4 for the first time) That being said, there will be no further revelations until the second coming of Christ. This makes a great litmus test for discerning apparitions.
Through the ages God has revealed Himself to us in many and varied ways which we have explored here before. Works, acts, prophets all lead up to the ultimate revelation of God = Jesus Christ. He completed and perfected the revelation of God. In other words, He was here, He met us, He spoke to us, He passed on His will to us, established an institution to keep His memory and teaching alive, and finally gives Himself to us in His Body and Blood. It would difficult to think of a way for Him to reveal Himself in time any more clearly unless He was reborn innumerable times and in thousands of locations to make Himself available to each of us personally – which, come to think of it, is exactly what kind of happens in the Eucharist. Huh. Well, I’m out of ideas.
That’s why He is God, and I am lowly priest.
Thus we have the new and definitive covenant with God. There will not be a newer covenant the new and everlasting covenant. It’s this or nothing.