Realm of Pure Thought

[anagogy]

I don't think you will need any special training to stay there when you are ready for it anymore than you need any special training to stay here in this world. By the time you enter such a realm, you won't be capable of experiencing fear. As you go up in density and planes, your conscious control over reality increases exponentially. The only time that fear or excitement would throw you out of such a state are temporary visits in some kind of astral projection, NDE, intense trance state, or acid trip.