In a wonderfully inventive motet, Isaac uses the Easter introit chant as the basis for his polyphony while simultaneously troping the Latin version of the German hymntune Christ ist Erstanden (Christus surrexit). I have italicized the trope text in the score to make it more clear to the singers. In the lyrics below the trope is enclosed by brackets.
Resurrexi et ad huc tecum sum, alleluia.
[Christus surrexit mala nostra texit]
posuisti super me manum tuam, alleluia.
[et quos hic dilexit hos ad coelos vexit]
mirabilis facta est scientia tua, alleluia, alleluia.
Domine probasti me et cognovisti me.
Tu cognovisti sessionem meam et resurrectionem meam
I am risen and am always with you. Alleluia
[Christ is risen. He has covered our evil works.]
You have placed your hand upon me, alleluia.
[and those whom he loves he will lead to heaven]
Your wisdom is shown to be most wonderful, alleluia, alleluia.
Lord, you have searched me and known me.
You know when I sit down and when I rise up