Riffing on a comment made in response to my post about the validity of religious experiences , I have a question to ask you folks.

If I have a mystical experience (or some other theophany), I say that I experienced some aspect of the Holy Trinity. A Hindu might say that he experienced Vishnu or Ganesh. A New Ager might say she saw a ghost. A conspiracy nut might say he was abducted by aliens. Let's assume for a moment that everyone who claims to have had a religious/mystical experience has actually had one. How do we know who's attribution is correct? Specifically, how do we Christians know that we are experiencing God the Father, Son, or Holy Spirit? What proof have we that we are more right than the equally convinced adherents of other religions?

Discuss.