Carmina Burana: commentary

There is a lot of depth, in the seemingly simplistic hit

O For-tu-na
ve-lut lu-na
sta-tu va-ri-a-bi-lis ...

Even without understanding an iota of this Latin, you can in all likelihood sing along to the opening bars of Carl Orff's Carmina Burana. Let's get right to the point: this is no surprise. But why?