Psychologically: If you believe in incarnation (the rebirth of the soul in different human existences), presumably look also in the dreams for tips to "another" or 'former' life. May be that contents, pictures and sensations coincide with one of your incarnation images. But if you deal with this topic seriously, you should handle even more critically with dreamt 'information about a former life': Not everything what seems 'anyhow famously and trusted' is a 'look behind the mirror' - sometimes it is also a projection.