Again Paul appears to identify the divine pneuma and the risen Christ. It is doubtful that Paul is interested in the ontological discussion that resulted in the later Trinitarian formulation. But he does appear to be concerned that the Corinthians understand that the Christ upon whom their hope is built is the one encountered in their experience of pneuma. It is through pneuma that Christ has illuminated their hearts and minds. Christ has come to them as life-giving pneuma and continues to lead them into new stages of glory as they become more and more like him. For Paul, and for his readers, there was no difference between the risen Christ and the pneuma in experience. Christ met them as pneuma. It was the pneuma of Christ that gave them life. In short, the risen Lord is the pneuma – the pneuma is Christ.
Walter Clifford Wright, Jr. "The Use of Pneuma in the Pauline Corpus with Special Attention to the Relationship between Pneuma and the Risen Christ," Ph.D. Dissertation, Fuller Theological Seminary, 1977, p. 246