One of the (few) things I like about Christianity is how open Christians are to talking about their visions of Jesus, heaven, angels, and other aspects of the divine.
If a Christian has a spiritual experience, he or she usually feels that this is something to be shared, not kept secret.
By contrast, there's a rather cult'ish tendency in Eastern religions, meditative practices, and mystical paths to -- shush! -- keep quiet about "inner" supposed supernatural experiences. I've always been suspicious of this, because it strikes me as a means of control.
For example, I'm quite familiar with the injunction of Radha Soami Satsang Beas (RSSB), an India-based group I was a member of for many years, to never divulge inner spiritual experiences.
I used to give frequent talks, satsangs, at RSSB meetings. One of my favorite lines was, "The easiest vow for us initiates to keep is the one to not talk about the experiences we have in meditation." I'd almost always hear laughter after saying that.
The reason: nobody was having any mystical experiences. At least, that's what I strongly suspected. How could I know for sure? Nobody was supposed to talk about the experiences they had while meditating.
So this was akin to buying a TV set which didn't show a clear picture and being unable to know whether anyone else could get the damn thing to work. That would be great from the standpoint of whoever sold you the television.
"It's a feature, not a problem," they could say. Not knowing whether your experience was typical, you'd find it difficult to persuade the store that you'd bought a bad product.
Likewise, gurus, masters, yogis, and such often promise specific mystical/spiritual experiences. However, if their disciples are forbidden to talk with each other about what experiences they are having, or not having, this allows the teachers to get away with merely the promise, not the reality -- because each student tends to think he or she is the only one not having marvelous inner experiences.
Another wrinkle is to tell the students, "If you talk about what is experienced in your meditation, you will lose those wonderful experiences."
Of course, this isn't much to worry about, since nobody is having those experiences. But disciples worry that they might someday. And they want to obey the teacher they have such unwarranted confidence in.
I've also heard this argument put forward: "Our relationship with the divine is so intimate, it must not be divulged to other people, just as we don't share the intimate details of sexual encounters with our beloved."
OK, this makes some superficial sense. Not much, though.
For one thing, many mystics have been extremely open about their love affair with "God" (or whatever other name they give the divine). Rumi, for instance. He wrote reams of poetry about the ruby lips of the beloved, and other spiritually-sensuous descriptions of his personal experiences.
Also, I've never understood why, if someone's spiritual experience is of a personal divinity, it isn't possible to describe the nature of that person -- leaving the details of one's intimate encounter private.
After all, husbands and wives have no problem talking about how they experience their spouse's qualities, even if they usually are reluctant to divulge what happens in the marriage bed.
So my conclusion is that when people refuse to talk about their supposed mystical exeriences, the reason is that they aren't having any genuine experiences. Believe me, if I ever have a conversation with God that strikes me as really real, readers of this blog will be the second to know (after me).