Thus, the Spirit of the Lord, who lives in his faithful, it is he who receives the sacred body and blood of the Lord.
So often we think of holy communion as something that we receive from Christ. In fact, it is the eternal communion of Father, Son, and Spirit, stretched forth to include us in the sacrifice of Christ, that we simply allow ourselves to step into.
Holy communion is the perfect joy and mutuality of the Trinity. The humanity of Christ--his Body and Blood we receive in the Eucharist--is just a portal for us enter into it.