The Prophet Joel [Jl 4:12-21] foretells a day for the Jews when God will reestablish his dwelling place among them where they can again offer him pure worship, unhindered by the pagans.
Indeed, the advent of Christ and his institution of the Most Holy Eucharist ensure the Divine Presence of God in our midst and perfect worship through his Son.
In our Gospel text [Lk 11:27-28], Christ foretells a day when even the pagans can know and worship the one, true God. Indeed, it is the same Holy Eucharistic Sacrifice, his sacrifice on the Cross, that allows the Gentile to know and worship God in the Heavenly Jerusalem, the Holy Mass.
It is our privilege in our own time to have the opportunity to pray in the language that once represented the pagan world along with the language of God’s Chosen People, thus exemplifying the triumphant fulfilling of today’s text from Luke. The priest can speak in Latin, and the people can respond in Hebrew with the "Amen", testifying to the victory of the Hebrew faith over the hearts and minds of the Roman Empire. It is as if Rome is in loving conversation with Jerusalem. The use of these two languages can be for us, then, a celebration of evangelization, and a motivation for us to seek other converts to the faith. Like balloons at a party, these two languages should fill us with joy, and aid our spirit of celebration.
[Mass proceeded with the following parts of the Ordinary in Latin, followed in each case by the people's "Amen": the Sign of the Cross, the Misereatur, the Invitation at the Collect, the Invitation at the Bidding Prayers, the Per Ipsum, the Invitation at the Post-Communion, and the Blessing.]