"The Holy Ghost is now in a state of probation which if he should perform in righteousness he may pass through the same or a similar course of things that the Son has.” (Joseph Smith, The Words of Joseph Smith, p. 245; Sabbath address, Nauvoo, 27 August 1843. Reported by Franklin D. Richards.)
I've often wondered what the story of the Holy Ghost would be like. Would he be born very last, after the thousand years of peace, when the spirit is withdrawn and things begin to descend before the final end? Is the spirit withdrawn because he's physically embodied?
Or would he be born on another world?
Or become part of another Godhead?