The nature of the human spirit varies, depending if it is the first human spirit received at conception or the newly created human spirit received during the Sacrament of Baptism. The first human spirit is sinful in nature and it shall endure death alongside its soul and physical body. The Holy Spirit is a separate Divine Presence of the Blessed Trinity. As Jesus had a mind of His own in His physical body, the Holy Spirit has a mind of His own in His spiritual form. As the physical body of man has a sinful mind, it also has a spiritual mind that belongs to his human spirit.
Man is double- minded.
As previously said, the Holy Spirit is eternal while the human spirit is created. As such, there is no equal between the two. It makes him of the seed of his father. Being created of the seed of God the Father by the power of the Holy Spirit in the Most Holy Name of Jesus, the human spirit that is received during the Sacrament of Baptism has the holy nature of God so it can worship the Father in spirit. Consider the Immaculate Heart of Mary.