Paul's perfection Epistles are emphatically THE TRUTH for the present. The 'Ephesian' Epistle, being addressed to all believers in CHRIST Jesus in contrast with the Circumcision, who hardly knew Him by this title, is the ranking revelation for the members of the Body of Christ. Here first are revealed those secrets that distinguish this administration from all others.
Never before has the heavenly destiny of the present Ecclesia (called-out-ones) been declared. All the other scriptures deal with the elementary and immature, but WE find perfection.
God's purpose had only partially been made known before, and seemed confined to earth. In this final transcendent revelation, His ultimate universal goal is first revealed. These three Epistles are closely related to each other, and should be studied together. As was shown in the outline of Paul's Epistles, this may be graphically presented thus

EPHESIANS Ch.1 - Ch.3.   Doctrine - The Body: its members.
EPHESIANS Ch.4 - Ch. 6.   Deportment
PHILIPPIANS Ch.1-Ch.4   Deportment
COLOSSIANS. Ch.1 - Ch.4.   Doctrine - The Body: its Head.

-Ephesians begins by presenting a careful and comprehensive statement of the truth for the present secret economy, laying stress on those aspects which concern the members of Christ's Body. Then, unfolds the truth of the joint Body in which all the members are of equal rank.

-Colossians is the counterpart of this, dealing with the same doctrines, but presenting them in relation to the HEAD of the Body, and the members subordinate to Him.

Both begin with God and with His primordial purpose. The members of the Body were chosen before the disruption of the earth. Ephesians 1:4. and now become the beneficiaries in His heavenly allotment.