Here, written to those who have counted the cost, born again, indwelt by the Holy Spirit per John 20:22 [KJV], "elect", Christians:
"The Truest Life of All
All things are of God.
“Be ye therefore followers”—of good principles? Of holiness? Of the life Jesus lived on earth? No! “Be ye therefore followers of God.” “Be ye therefore perfect, as your Father which is in heaven is perfect.” God by sanctification creates us into the image of His Son. Do we choose to walk in the light of that life? Never make excuses, never turn to the right hand nor to the left. Keep the life concentrated on this marvellous gift of God, “Christ Jesus, who of God is made unto us . . . sanctification.”
In Heavenly Places
"And hath raised us up together, and made us sit together in heavenly places, in Christ Jesus". Ephesians 2:6
Sanctification is the impartation to us [NOT imputation] of the holy qualities of Jesus Christ. It is His patience, His love, His holiness, His faith, His purity, His godliness that are manifested in and through every sanctified soul. The presentation that God by sanctification plants within us His Spirit, and then setting Jesus Christ before us says—“There is your Example, follow Him and I will help you, but you must do your best to follow Him and do what He did,” is an error. It is not true to experience, and, thank God, it is not true to the wonderful Gospel of the grace of God. The mystery of sanctification is “Christ in you, the hope of glory.” “That which hath been made was life in Him” (rv mg), that is, Jesus Christ can create in us the image of God even as it was in Himself."
cf "My little children, of whom I travail in birth again *"UNTIL" Christ be formed in you," Galatians 4:19 (KJV)
[Gal 4:19 KV, added emphasis] [*Operative word by Paul]
Chambers, O. (1965). Our brilliant heritage. London: Marshall, Morgan & Scott.