Part of the glory given by Christ to his disciples, to his Church, is the glory of the divine unity, the divine fellowship—“that they may be one, even as we are one.” To be united with him in the fellowship of his sufferings is to be united with all the others in the same holy fellowship. The glory of the Cross is in part the glory of a perfect unity with the will of God.
Here we touch upon a mystery which can only be resolved if we recognize that the Glory which Christ our Lord gave to his disciples in the Upper Room and gives to us his disciples of a later day is glory only partly revealed, only partly understood, only partly appropriated, in the present. It will be fully revealed, fully understood, fully appropriated only in the future when the victory of the Cross over sin and death and the powers of evil is finally accomplished.
–Max Warren, “Eschatology and Worship,” Theology Today 6:4 (1950), pp.481-482