Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fullness of Christ:
All Commentaries on Ephesians 4:13 Go To Ephesians 4
Ambrosiaster
AD 400
He exhorts them to strive to attain to the perfecting of faith, the essence of which is to hold fast to Christ as true and perfect God. Do not measure him by some human measure. Measure yourself by regarding him as perfect God in the fullness of his deity. When he refers to a mature man he does not mean a span of years or physical stature but a maturation into the full understanding of the divinity of the Son of God.