| | Lucid Dreaming
What I have found, by personal experience, is that there are various approaches to Lucid Dreaming, most of which get the user not very far. Most think that it is a free for all fantasy state, but if this is true, then ask a very specific question, and concentrate on that question alone before entering state. You may get a visual presentation. Now, Say what you see, in terms of what Plato would call, the Simili in Multis.
If you then come to understand the principle of metaphor, and what it has to do with psychology, you will be much further ahead.
As far as prophetic visions, they may happen as a result of very specific questions--and if you get really advanced, you can simply ask and close your eyes and you will see. But it is a question about vision in general. It has nothing to do with personal power, but with truth, and fact, and you may not like the answer.
Treat the state as a learning state, designed specifically for you and you alone and you just might make some real progress-- but it will be the hardest thing you have ever done.