The awakened self is conceived without the mixing of the ordinary human will. Mary is the pure receptive soul, the still water in a person that takes in the higher life directly; the child forms in her by the indwelling breath alone, before she and the outward, laboring nature have come together. What is born of the deeper spirit does not begin in the striving of the surface self but in the quiet receiving of the source.
Joseph stands for the practical, providing side that has not yet joined the receptive soul; the conception is earlier and higher than his reach. The new life rises in the still, receptive depth of a person, formed by the source and not by human effort.
Mary: the pure receptive soul in a person, the still depth that takes in the higher life directly
Joseph: the practical, providing side of the self, the outward laboring nature not yet joined to the receptive soul
Holy Ghost: the indwelling breath of the source that forms the new life within, apart from human will