What proves the best nurse you can have?

With reference to the soul, it seems as if the Father said to Nature—

Take this child and nurse it for me—

The physical proves the best nurse that you can have. 

Then, when you have grown to maturity, you are passed on to the care of those in the psychic world, and they watch over you, and help you, until the wounds are all healed, and your strength restored, so that you can begin a new and worthy life.