Firstly, you need to understand the meaning of the word spirit. There are
two non-physical parts of a person: one is the soul, and the other is the
spirit.
The soul is the part of a human being that includes personality,
rationality, character, and emotions. It is where each person develops language
and the intellectual capacity to understand and communicate all that they learn
throughout life. It is also the seat of what we call IQ. Additionally, it is
where one's professional abilities and skills are formed over time.
However, it is also in the soul where the deeper meanings of
concepts such as Name, Life, Right/Wrong, Sin, Righteousness, Redemption, Morality/Ethics, Gospel, Baptism, God the Father, God the Son, and God the Holy Spirit are not developed—because
the capacity of the spirit, without spiritual rebirth, is considered dead.