If we sing what the Church wants us to sing, the nature of the music presents the words to us in such a way that helps us to understand them. Another very interesting post on the New Liturgical Movement by Jeff Tucker:
Lent is a fantastic example of this, and this Sunday in particular, when the propers intrigue us with their form and structure. The Introit is joyful, and the Tract is too, but it is shockingly long, while the Gospel itself is short. The propers are uniformly from Psalm 90, which his highly unusual, and this happens to be the same Psalm that the Devil quotes during the period of temptation.
See the whole post.