Fall on your knees...

Deus, qui hanc sacratíssimam noctem veri lúminis fecísti illustratióne claréscere: da, quaésumus; ut, cujus lucis mystéria in terra cognóvimus, ejus quoque gáudiis in caelo perfruámur. Qui tecum vivit.
O God, who hast made this most holy night to shine forth with the brightness of the true light, grant, we beseech Thee, that we who have known the mystery of His light on earth, may attain the enjoyment of His happiness in Heaven. Who with Thee liveth.


(From the Collect of the Roman Missal - Mass at Midnight [Source: St. Andrew Missal]
H/T: Fr. Acervo