illuminosa immortalis sancta glorisa是什么意思？

illuminosa immortalis sancta glorisa是什么意思？

这是Libera合唱团的《I am the day》中的一句歌词，
完整歌词如下：
I am the day, soon to be born

I am the light before the morning

I am the night that will be dawn

I am the end and the beginning

I am the Alpha and Omega

The night and day, the first and last

Illuminosa immortalis sancta gloriosa

Illuminosa immortalis sancta gloriosa

In Aeterna

I am the light soon to begin

I am the new hope in the morning

I am the darkness soon to be light

I am the rising and the falling

I am the Alpha and Omega

The night and day, the first and last

Illuminosa immortalis sancta gloriosa

Illuminosa immortalis sancta gloriosa

In Aeterna

I am the day soon to be born

I am the light before the morning

I am the Alpha and Omega

The night and day

illuminosa immortalis sancta glorisa是什么意思？