Requiem without a Requiem

What’s the relation between the German Requiem–Johannes Brahms’ beautiful work–and the Requiem genre? There is not a single word in Brahm’s work from the Latin requiem text. Are Henry Purcell’s Funeral Sentences less exciting due to the fact that the texts he chose for them are not from the requiem? Such is the case with Cantata 106 by J.S. Bach “God’s time is the very best time.”
Listeners are invited on a journey through a collection of beautiful works written to part from those who have passed away. Works of music that bring comfort and fill the heart.