Leave at the altar every desire and every prayer other the desire and prayer of Christ. This is the astonishing reality of the Eucharist: that in exchange for the limited desires we bring to it, Christ gives the immensity of His own single desire; and that in exchange for our paltry prayers, he gives us His own filial and priestly prayer to the Father. Thus does the Holy Spirit “help us in our weakness; for we do not know how to pray as we ought” (Rom 8:26). Come, Holy Spirit!

Here.