If we want to be Spiritual there is no need for us to amputate our hands or feet; we can have our body.
So we can have our soul, the full use of our faculties, but it is not our life-spring; we are not living in it, we are not living by it, we use it.
When the body becomes the life of man, we live like beasts.
When the soul becomes the life of man we live as rebels from God, we live apart from the life of God.
When we have to live our life in the Spirit, and by the Spirit, we use our soul faculties just as we use our physical faculties.