The flesh was without sin until Adam sinned.
Romans, chapter 8
"11": But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.
The flesh will live again also, how could there be a ressurection if the flesh did not raise from the ground as Jesus did. The flesh is something too, it is enough that Jesus was willing to die for it.
Psalms, psalm 116
"15": Precious in the sight of the LORD is the death of his saints.
If you don't believe the flesh will raise then what about Jesus raising from the dead.
1 Corinthians, chapter 15
11": Therefore whether it were I or they, so we preach, and so ye believed.
"12": Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead?
"13": But if there be no resurrection of the dead, then is Christ not risen:
"14": And if Christ be not risen, then is our preaching vain, and your faith is also vain.
"15": Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not.
"16": For if the dead rise not, then is not Christ raised:
"17": And if Christ be not raised, your faith is vain; ye are yet in your sins.
"18": Then they also which are fallen asleep in Christ are perished.
"19": If in this life only we have hope in Christ, we are of all men most miserable.
"20": But now is Christ risen from the dead, and become the firstfruits of them that slept.
Raising from the dead is the whole meaning of salvation both soul and body. It says satan is seeking whom he may devour but he don't devour the Christians!! No flesh would be saved except those days were shortened (Trib)