Hosting the Holy Spirit in our body turns us into a holy spirit of God since His Spirit speaks through us (1 John 4:1) and because we became holy upon our transformation (Romans 12:1-2, 1 Peter 1:15-16).
But he that is joined unto the Lord [YAHWEH] is one spirit. 1 Corinthians 6:17 ASV
1 John 4:1-3 ASV
(1) Beloved, believe not every spirit, but prove the spirits, whether they are of God; because many false prophets are gone out into the world.
(2) Hereby know ye the Spirit of God: every spirit that confesseth that Jesus Christ is come in the flesh is of God:
(3) and every spirit that confesseth not Jesus is not of God: and this is the spirit of the antichrist, whereof ye have heard that it cometh; and now it is in the world already.
Romans 10:8-11 ASV
(8) But what saith it? The word is nigh thee, in thy mouth, and in thy heart: that is, the word of faith, which we preach:
(9) because if thou shalt confess with thy mouth Jesus as Lord [YAHWEH, JEHOVAH], and shalt believe in thy heart that God raised him from the dead, thou shalt be saved:
(10) for with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
(11) For the scripture saith, Whosoever believeth on him shall not be put to shame.
Man must be born of the Holy Spirit
(5) Jesus answered, Verily, verily, I say unto thee, Except one be born of water and the Spirit, he cannot enter into the kingdom of God.
(6) That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
(7) Marvel not that I said unto thee, Ye must be born anew.
(8) The wind bloweth where it will, and thou hearest the voice thereof, but knowest not whence it cometh, and whither it goeth: so is every one that is born of the Spirit.
John 3:5-8 ASV
Man must walk in the holy Spirit to war against his flesh
(16) But I say, Walk by the Spirit, and ye shall not fulfil the lust of the flesh. (17) For the flesh lusteth against the Spirit, and the Spirit against the flesh; for these are contrary the one to the other; that ye may not do the things that ye would. 18) But if ye are led by the Spirit, ye are not under the law. (19) Now the works of the flesh are manifest, which are these: fornication, uncleanness, lasciviousness, (20) idolatry, sorcery, enmities, strife, jealousies, wraths, factions, divisions, parties, (21) envyings, drunkenness, revellings, and such like; of which I forewarn you, even as I did forewarn you, that they who practise such things shall not inherit the kingdom of God.
Galatians 5:16-21 ASV
Man in Jesus is a spirit
But he that is joined unto the Lord is one spirit. 1 Corinthians 6:17 ASV
For in one Spirit were we all baptized into one body, whether Jews or Greeks, whether bond or free; and were all made to drink of one Spirit. 1 Corinthians 12:13 ASV
That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. John 3:6 ASV
Resisting the flesh is the sign of being a spirit in Jesus
(1) and you being dead in deviations and sins, (2) in which you formerly walked according to the course of this world, according to the ruler of the authority of the air, the spirit now working in the sons of disobedience, (3) among whom we also all conducted ourselves in times past in the lusts of our flesh, doing the things willed of the flesh and of the understanding, and were by nature the children of wrath, even as the rest. (4) But God, being rich in mercy, because of His great love with which He loved us, (5) even we being dead in deviations, He made us alive together with Christ (by grace you are being saved), (6) and raised us up together and seated us together in the heavenlies in Christ Jesus, (7) that He might demonstrate in the ages coming on, the exceeding great riches of His grace in kindness toward us in Christ Jesus. Ephesians 2:1-7 LITV