I agree. There is no "new" spiritual world for the Christian believer. The Scripture says that believers live by faith, which is total trust and dependence on written Scripture. The "higher life" and "spiritual realm" are figments of the imagination. When the Bible describes a person as "spiritual" ("those who are spiritual judge all things), it is talking about someone living and walking in the Spirit. And the way we walk in the Spirit is that we walk by faith and not by sight.I think the op was deliberate in her verbage. " Open up new spiritual world" states the motive
So this idea that someone is elevated to a "higher spiritual plane" is New Age occult. Walking in the Spirit is living according to the fruit of the Spirit, which is love, joy, peace, gentleness, kindness, patience, faithfulness, goodness and self-control. Not being elevated to some mystical spiritual realm above the normal "herd" godly believers.
The notion of a "spiritual world" originally comes from the monastic mysticism of the Middle Ages where through total separation from the world, locked away in a small cell, the monks achieve heightened spiritual awareness of God, the universe and everything. They didn't call it "New Age" way back then, but it is the same thing.