Nothing is created that doesn't have a purpose for existing. This is true for human beings -- the crown of creation. But something has happened to make us a crown of thorns. This is due to a misunderstanding of the purpose of our life. We're lost because there are competing powers within us. Our mind identifies with whichever is prevalent. Rebirth reveals the nature that isn't divided.
Story of botanist -- a good man but unhappy -- who finds an orchid. He couldn't stay where it was but couldn't bring it with him. Through a mystical rebirth he carried it in his heart and mind -- it was born in him. The pained, false nature was exchanged. Rebirth is an exchange in a human being of one nature for another.
In my Father's house are many mansions - high and low parts. We live from the low part but are meant to live from the high -- and to know the difference. The Light shows us where we don't have the Light. We're in the middle between the Light that shows us a new life exists and the lower. The Light radiates down and we must climb up to reach the ideal. No one is not moving one way or the other. Rebirth is the ascension to the ideal, which requires sacrifice of the lower. The person suffers himself for love. If the person agrees to the lower, he's agreed to the lower will and is not purified, but petrified. If he chooses the higher ideal, the Light, the ideal will begin to form itself in that person and transform the present nature. Our task is to agree to the moment when we must choose between high and low, and allow the Light to enter. We sacrifice ourselves. We allow the lower nature to be sacrificed for love. Then we are reborn because the Light that created us makes us a new man.