The Holy Spirit does not intervene a posteriori within the framework of Christology, as a help in overcoming the distance between an objectively existing Christ and ourselves; he is the one who gives birth to Christ and to the whole activity of salvation, by anointing Him and making him Χριστὸς (Luke 4.13). If it is truly possible to confess Christ as the truth, this is only because of the Holy Spirit (I For. 12.3). And as a careful study of I Cor. 12 shows, for St. Paul the body of Christ is literally composed of the charismata of the Spirit (charisma = membership of the body). So we can say without risk of exaggeration that Christ exists only pneumatologically, whether in His distinct personal particularity or in His capacity as the body of the Church and the recapitulation of all things.
John D. Zizioulas, Being as Communion: Studies in Personhood and the Church
christology, holy-spirit, orthodoxy