They have not understood that the Lord's Cross discloses the entire dispensation of His coming in the flesh, and contains within it the whole mystery of this dispensation. Extending in all directions, it embraces everything above, below, around and between.
'Now we are the sons of God'. This is the starting point of adoption. However, 'it does not yet appear what we shall be: but we know that, when He shall appear, we shall be like Him; for we shall see Him as He is' (I Jn. 3:2). This is the perfection of adoption of sons and renewal which God bestowed on us in Christ, and of which John says in his Gospel that, 'Christ gave power to become the sons of God, even to them that believe on His name: which were born, not of blood, nor of the will of the flesh nor of the will of man, but of God' (Jn. 1:12-13).