Perfect means we are meeting our fullest potential according to our stage of growth. Rosebuds and full blooms can alike be perfect.
But we are also called to be holy, for without holiness we shall not see God. We are made holy by the presence of God in our lives. God is a consuming fire, yet the bush was not consumed, why not? Because it was holy. Like gold tried in the fire, if God is present, it is the sin, the evil habits, the useless and wicked character traits that are consumed.
God is holy. His presence cannot but make us holy also. That is the power of the gospel. That is the gospel of grace. The power of God in the life to sanctify and set us free from sin, purifying the thoughts and cleansing the soul temple from all defilements. Sadly, not all Christians believe this is possible, and thankfully, those Christians who do believe it possible will never admit to its complete accomplishment in their own life... Yet paradoxically, it will only be those with the faith to believe that they can live a life free of sin... That God does have the power to keep us from sinning... Who will enter into God's kingdom.
KJV Hebrews 12
14 Follow peace with all men, and holiness, without which no man shall see the Lord:
KJV Romans 6
19 I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness.
20 For when ye were the servants of sin, ye were free from righteousness.
21 What fruit had ye then in those things whereof ye are now ashamed? for the end of those things is death.
22 But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life.