I was just thinking about that.
Define spiritual.
I do not believe the spiritual is disconnected from the physical.
Anything which actually exists is "material" to the situation.
If one believes our selves are basically spiritual, the spiritual component does rely on the physical in the case of humans being humans -or spirits interfacing with the physical universe -and the makeup of a spiritual self would be the same -only not subject to the same physical laws which we are as physical humans.
If basically spiritual -what is spirit -and how is it arranged as a self?
How does it think,more member, plan, etc....
We are subject to the laws which govern the atoms, etc., because we are composed of atoms. We may possess a "spirit" -but it has no interface when our body dies or to lesser degrees when it malfunctions. The "spirit" is what allows us to decide upon the configuration of the physical -and to change it -but only to the degree that we are of an arrangement which allows it -and this applies to the spirit as well as the flesh.
When our "atomic" arrangement decomposes, our spirit returns to God -but that is not to say it is "immaterial" in the broadest sense -is not "composed" of something -or does not have an arrangement.
Biblically, our "vile body" will decompose, but our spirits will be put within an improved body/interface -which will be of some sort of "working" which will allow for creative power similar to that which allowed the Word to create all things and "subdue all things unto himself".
Phil 3:21 Who shall change our vile body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself
Though our spirit can be separated from our physical body, the spirit -our "person" -is of an arrangement which can be stored -as we are not what we once were -and grow and mature "spiritually" over time. That arrangement may be composed of "spirit" -and/or may be an emergent pattern of that which is above/before the physical.
In other words, "spirit" is something -but what is it -and how is it arranged as a person who inhabits a physical body?
The questions and answers are the same -but on a different level.
When "our spirit" is put within that improved "glorious" body -essentially composed of -an arrangement of -"spirit", we will then BE spirits.
John 3:3Jesus answered and said unto him, Verily, verily, I say unto thee,
Except a man be born again, he cannot see the kingdom of God.
4Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born?
5Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and
of the Spirit, he cannot enter into the kingdom of God.
6That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. 7Marvel not that I said unto thee, Ye must be born again. 8The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.