Hymns that mean something!
That say things that matter!
Hymns with a purpose!
Instead of, "well, it gives me a peaceful feeling....", or "I like it...." or best of all, "it's just a hymn, what do the words matter?"
Read about St Ephrem, here, and here.
Give thanks to the One Who sent His anger... that His anger might be a merchant of mercy.
I have an idea!
Maybe there should be a new rule: you can sing any non-liturgical text you want at Mass --AS LONG AS IT'S WRITTEN BY A DOCTOR OF THE CHURCH.