Natus ad hoc

Hæc dicit Dominus Deus: Egredietur virga de radice Iesse, et flos de radice eius ascendet. (From the Lesson for Ember Friday in Advent, Isaias xi,1: "Thus saith the Lord God: There shall come forth a rod out of the root of Jesse, and a flower shall rise up out of his root.")

[T]he Messianic idea assumed in Isaias a clearness and an abundance of expression which it is impossible to render