Greetings again keiw,
I disagree with your sharp distinction between "Flesh" and "Spirit". Jesus had his body changed, transformed from mortality to immortality, not replaced. God raised him from the dead and the tomb was empty.
Philippians 3:20-21 (NWT online): 20 But our citizenship exists in the heavens, and we are eagerly waiting for a savior from there, the Lord Jesus Christ, 21 who will transform our humble body to be like his glorious body by his great power that enables him to subject all things to himself.
Philippians 3:20–21 (KJV): 20 For our conversation is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ: 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.
Change, transform: Strong's 3345 μετασχηματίζω [metaschematizo /met·askh·ay·mat·id·zo/] v. From 3326 and a derivative of 4976; TDNT 7:957; TDNTA 1129; GK 3571; Five occurrences; AV translates as “transform” twice, “transfer in a figure” once, “transform (one’s) self” once, and “change” once. 1 to change the figure of, to transform.
Romans 12:1-2 (NWT online): 1 Therefore, I appeal to you by the compassions of God, brothers, to present your bodies as a living sacrifice, holy and acceptable to God, a sacred service with your power of reason. 2 And stop being molded by this system of things, but be transformed by making your mind over, so that you may prove to yourselves the good and acceptable and perfect will of God.
Romans 12:1–2 (KJV): 1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. 2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
One application of this word is the change from a grub to a butterfly.
Mark 9:1-4 (NWT online): 1 Furthermore, he said to them: “Truly I say to you that there are some of those standing here who will not taste death at all until first they see the Kingdom of God already having come in power.” 2 Six days later Jesus took Peter and James and John along and led them up into a lofty mountain by themselves. And he was transfigured before them; 3 his outer garments began to glisten, becoming far whiter than any clothes cleaner on earth could whiten them. 4 Also, E·liʹjah with Moses appeared to them, and they were conversing with Jesus.
Mark 9:1–4 (KJV): 1 And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen the kingdom of God come with power. 2 And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured before them. 3 And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them. 4 And there appeared unto them Elias with Moses: and they were talking with Jesus.
Kind regards
Trevor