The text puts the judgment of the sheep and goats AT Christ's second coming, not after the millennial kingdom.The word perfect doesn’t mean sinless, but complete.
Here is what the Judgement for Christian’s looks like.
“When the Son of Man comes in His glory, and all the holy angels with Him, then He will sit on the throne of His glory. All the nations will be gathered before Him, and He will separate them one from another, as a shepherd divides his sheep from the goats. And He will set the sheep on His right hand, but the goats on the left. Then the King will say to those on His right hand, ‘Come, you blessed of My Father, inherit the kingdom prepared for you from the foundation of the world: for I was hungry and you gave Me food; I was thirsty and you gave Me drink; I was a stranger and you took Me in; I was naked and you clothed Me; I was sick and you visited Me; I was in prison and you came to Me.’
“Then the righteous will answer Him, saying, ‘Lord, when did we see You hungry and feed You, or thirsty and give You drink? When did we see You a stranger and take You in, or naked and clothe You? Or when did we see You sick, or in prison, and come to You?’ And the King will answer and say to them, ‘Assuredly, I say to you, inasmuch as you did it to one of the least of these My brethren, you did it to Me.’
“Then He will also say to those on the left hand, Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels: for I was hungry and you gave Me no food; I was thirsty and you gave Me no drink; I was a stranger and you did not take Me in, naked and you did not clothe Me, sick and in prison and you did not visit Me.’
“Then they also will answer Him, saying, ‘Lord, when did we see You hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to You?’ Then He will answer them, saying, ‘Assuredly, I say to you, inasmuch as you did not do it to one of the least of these, you did not do it to Me.’ And these will go away into everlasting punishment, but the righteous into eternal life.”
Here are the two options Christian’s will hear at the Judgement seat of Christ -
- Then the King will say to those on His right hand, ‘Come, you blessed of My Father, inherit the kingdom prepared for you from the foundation of the world:
2. Then He will also say to those on the left hand, Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels:Paul says it this way -For we must all appear before the judgment seat of Christ, that each one may receive the things done in the body, according to what he has done, whether good or bad. Knowing, therefore, the terror of the Lord, we persuade men; but we are well known to God, and I also trust are well known in your consciences. 2 Corinthians 5:10-11
- Knowing, therefore, the terror of the Lord, we persuade men;
The context (Ten Virgins Mt. 25:1-13; "Servants" Mt. 25:14-30) implies the Sheep and Goats are uncommitted members of Christendom, those who went to church but were not converted. Some of them practiced Christianity which indicates they eventually would have become born again Christians. Others proved they were TARES having no emphathy for those needing help. Therefore, "the nations" gathered that day are Christians from all nations. Judgment begins first with the house of God (1 Pet. 4:17).
Nothing about the resurrection of the dead, Great White Throne, appear here because this isn't Judgment Day. Its a day when Christ begins cleansing the earth of all the wicked, including those who call themselves Christian but are not.