Some want it defined or the state described, claiming ignorance. So, what is perfection for man? Perfection is back to the state that Adam was created, without sin yet with free will choice, the perfection which Jesus as flesh has shown us.
It is manifest in the lives of all who are truly connected with Christ, doers of the Word, not just hearers.
James 1:22
But be ye doers of the word, and not hearers only, deceiving your own selves.
Christ talks of overcoming, and that's not talking about while were in heaven.
Revelation 3:21 King James Version (KJV)
21
To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.
And we have this from Christ our example..
Philippians 2:5-8 King James Version (KJV)
5 Let this mind be in you, which was also in Christ Jesus:
6 Who, being in the form of God, thought it not robbery to be equal with God:
7 But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:
8 And being found in fashion as a man, he humbled himself, and
became obedient unto death, even the death of the cross.
And it wasn't easy...
Hebrews 5:7-8 King James Version (KJV)
7 Who in the days of his flesh, when he had offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and was heard in that he feared;
8 Though he were a Son, yet
learned he obedience by the things which he suffered;
And it will be before He comes...
Revelation 22:10-12 King James Version (KJV)
10 And he saith unto me, Seal not the sayings of the prophecy of this book: for the time is at hand.
11
He that is unjust, let him be unjust still: and he which is filthy, let him be filthy still: and he that is righteous, let him be righteous still: and he that is holy, let him be holy still.
12 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.