Mysterium

Personent hodie
Voces puerulae
Laudates jucundae
Qui nobis est natus
Personent hodie
Voces puerulae
Laudates jucundae
Qui nobis est natus
Summo Deo datus
Ideo, gloria in excelsis Deo
Stella maris
Semper clara
Rosa munde
Res miranda
Mysterium mirabile

(transl. by dru)
Let resound today
Youthful voices praises of joy
He who is born to us
Given by God on high
Therefore, glory be to God
In the highest
Star of the sea
Always brilliant
Spotless rose
State to marvel
Wonderous mystery