"...either were already perfect..."
he is not only speaking of the resurrection of the dead.
The perfection mentioned here is again mentioned in the final verse of Phil 3..."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."
Which perfection do you think Phil 3:15 is talking about?
"15
Let us therefore, as many as be perfect, be thus minded: and if in any thing ye be otherwise minded, God shall reveal even this unto you."
As some have already been granted one kind of perfection, and another kind of perfection awaits, isn't it obvious that
there are two subjects of perfection?
One, of the vessel, but the other of the man inside the vessel?
1Jo 1:8, If we say that we have no sin, we deceive ourselves, and the truth is not in us.
John used an A-B, A-B, A-B system of verses here to juxtapose those who walk in darkness-sin with those who walk in light-God.
(Paul used the same kind of A-B juxtapositioning in Rom 8 where he juxtaposed those who walk in the flesh with those who walked in the Spirit.)
1 John 1:6, 8,and 10 apply to those walking in darkness-sin.
They cannot truthfully say they have no sin, or that they have fellowship with God.
1 John 1:5, 7, and 9 apply to those walking in the light, which is God.
If there is no sin in God, how can there be any sin in those walking in God?
Gal 3:22, But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
Thanks be to God for the gift of repentance FROM sin so we can be done with it permanently !
Rom 11:32 (nlt), For God has imprisoned everyone in disobedience so he could have mercy on everyone.
Thanks be to God for that mercy, and for the mercy to free us from service to sin. (John 8:32-34)
Are you still "imprisoned"?