How does the soul grow?

The psyche grows only in soul-ways, waxing strong in spirit, that is, the soul has increased power of manifesting itself a more varied and fuller life. 

This growth is not always at the same rate; sometimes, the soul seems to remain stationary or even to decline for a while, but speaking generally, progress is the law of the new nature, as of the old. 

The soul, when it reaches the highest point of perfection―when it is truly matured―is prepared for another form of life and departs to higher regions.

The time of your departure is not in any way fixed by your own will or sense of fitness. Generally, you become aware when your hour is at hand; a higher power than your own, above you, yet in you, sweetly constrains you to depart. 

The body, which you have then dissolves, disappears and is restored to the sphere from which it was taken, as your body (though much less quickly), returns to the earth from which it was derived. 

Painlessly, and naturally, the tent is taken down and the new heavens appear to you in all their spiritual beauty.

Thus, you leave behind you no corrupting body to hurt or annoy but fade away from the vision like a cloud.