For mental disposition or vital principle, one may see John 6:63 & 2 Corinthians 3:6 for those examples for why it is definitely not referring to the Person of the Holy Spirit.
John 6:63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
2 Corinthians 3:6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
Matthew 5:35:3 Blessed [are] the poor in spirit: for theirs is the kingdom of heaven. pneuma referring to the spirit of the man.
Matthew 26:41Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak. pneuma referring to the spirit of the man
Matthew 27:50 Jesus, when he had cried again with a loud voice, yielded up the ghost. pneuma referring to the ghost of Jesus
The Greek word "pneumata" is plural of pneuma FYI If pneumata is used for plural of devils and unclean spirits, then pneuma can be applied to the devil in the singular as well as to an unclean spirit even though there is another Greek word for devil in the singular.
Matthew 8:16 When the even was come, they brought unto him many that were possessed with devils: and he cast out the spirits with his word, and healed all that were sick: pneumata referring to spirits that are devils
Matthew 10:1And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease. pneumata referring to unclean spirits
Hebrews 1:13 But to which of the angels said he at any time, Sit on my right hand, until I make thine enemies thy footstool?
14 Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation? pneumata is referring to the angels in the previous verse.
Acts 23:9 And there arose a great cry: and the scribes that were of the Pharisees' part arose, and strove, saying, We find no evil in this man but if a spirit or an angel hath spoken to him, let us not fight against God. pneuma is referring to the same angel
These are just a few examples for why pneuma is not always referring to the Person of the Holy Ghost or the Holy Spirit if you prefer, although referring to the same Being. It all depends on how it is used in the verse.
John 6:63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
2 Corinthians 3:6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
Matthew 5:35:3 Blessed [are] the poor in spirit: for theirs is the kingdom of heaven. pneuma referring to the spirit of the man.
Matthew 26:41Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak. pneuma referring to the spirit of the man
Matthew 27:50 Jesus, when he had cried again with a loud voice, yielded up the ghost. pneuma referring to the ghost of Jesus
The Greek word "pneumata" is plural of pneuma FYI If pneumata is used for plural of devils and unclean spirits, then pneuma can be applied to the devil in the singular as well as to an unclean spirit even though there is another Greek word for devil in the singular.
Matthew 8:16 When the even was come, they brought unto him many that were possessed with devils: and he cast out the spirits with his word, and healed all that were sick: pneumata referring to spirits that are devils
Matthew 10:1And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease. pneumata referring to unclean spirits
Hebrews 1:13 But to which of the angels said he at any time, Sit on my right hand, until I make thine enemies thy footstool?
14 Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation? pneumata is referring to the angels in the previous verse.
Acts 23:9 And there arose a great cry: and the scribes that were of the Pharisees' part arose, and strove, saying, We find no evil in this man but if a spirit or an angel hath spoken to him, let us not fight against God. pneuma is referring to the same angel
These are just a few examples for why pneuma is not always referring to the Person of the Holy Ghost or the Holy Spirit if you prefer, although referring to the same Being. It all depends on how it is used in the verse.