I think one the most crucial sentences in the Seven Valleys comes at the beginning of the Valley of Unity, where Baha’u’llah says that the Valley of Knowledge is “the last station of limitation”:
“After passing through the Valley of Knowledge, which is the last station of limitation, the wayfarer cometh to the First Station of Unity and drinketh from the cup of oneness, and gazeth upon the manifestations of singleness.”Valley of Unity in The Seven Valleys, in The Call of the Divine Beloved
I think this statement divides the valleys into two, where the valleys of search, love and knowledge relate to this world, and the valleys of unity and beyond relate to the spiritual worlds. The shift from the Valley of Knowledge to the Valley of Unity marks the point where the wayfarer shifts her perspective from this world to the eternal realms.
In other words, once a person reaches the Valley of Unity, they look at this world from the perspective of someone looking back at it from the spiritual worlds. That is, they are looking from the perspective their soul, which inhabits the spiritual worlds. In contrast, before the shift in consciousness, they looked at this world from the perspective of someone who exists in this world, as though they were a part of this world.
And the thing is this, human beings are not of this world. We are divine creatures whose true home is the spiritual realms. We are only in this world temporarily, in order to develop the spiritual powers needed for life in the next world. What we have to do during our lifetime is wake up to the fact that this world is only like dreams or shadows that are made into reality for the sake of our education.