Be Perfect, obtaining full maturity in Christ

Be perfect, therefore, as your heavenly Father is perfect.
Matthew 5:48

Therefore be imitators of God, as beloved children.
Ephesians 5:1

Because it is written, Be ye holy; for I am holy.
1 Peter 1:16

So let us stop going over the basic teachings about Christ again and again. Let us go on instead and become mature in our understanding. Surely we don't need to start again with the fundamental importance of repenting from evil deeds and placing our faith in God. You don't need further instruction about baptisms, the laying on of hands, the resurrection of the dead, and eternal judgment. Hebrews 6:1-2

Finally, brethren, farewell. Be perfect, be of good comfort, be of one mind, live in peace; and the God of love and peace shall be with you. 2 Corinthians 13:11

Unity and Maturity in the Body of Christ (Eph 4:1-16)

1As a prisoner for the Lord, then, I urge you to live a life worthy of the calling you have received. 2Be completely humble and gentle; be patient, bearing with one another in love. 3Make every effort to keep the unity of the Spirit through the bond of peace. 4There is one body and one Spirit, just as you were called to one hope when you were called; 5one Lord, one faith, one baptism; 6one God and Father of all, who is over all and through all and in all.

7But to each one of us grace has been given as Christ apportioned it. 8This is why ita says:

“When he ascended on high,
he took many captives
and gave gifts to his people.”b
9(What does “he ascended” mean except that he also descended to the lower, earthly regionsc ? 10He who descended is the very one who ascended higher than all the heavens, in order to fill the whole universe.) 11So Christ himself gave the apostles, the prophets, the evangelists, the pastors and teachers, 12to equip his people for works of service, so that the body of Christ may be built up 13until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ.

14Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of people in their deceitful scheming. 15Instead, speaking the truth in love, we will grow to become in every respect the mature body of him who is the head, that is, Christ. 16From him the whole body, joined and held together by every supporting ligament, grows and builds itself up in love, as each part does its work.