Your dream sounds like an amazingly uplifting experience.
Lucid dreaming: it is reported that people can learn to do it; the boundary of separation modulates such that the individual remains conscious and in command, as he is while awake, but in the universe of his dream time. This can of course be risky, depending on how willing the being is to experience "extracurricular" reality. It can shake up your most cherished assumptions. On the othe rhand it can lead you into some very interesting corners and reportedly wreak cghanges in your life in real spacetime, as well.