Lilium

Anime: Elfen Lied エルフェンリート(Erufen Rīto)

Artist: Kumiko Noma

Type: Opening

Romaji:

Os iusti edita vitus sapientiam
Et lingua eius no praetendiense

Beatus vir qui suffert tentationem
Quoniam cum probates fuerit accipient coronam vitae

Kyrie, ignis divine, eleison

O quam sancta
Quam serena
Quam benigma
Quam amoena
O castitatis lilium

Ah...

Kyrie, ignis divine, eleison

O quam sancta
Quam serena
Quam benigma
Quam amoena
O castitatis lilium 

English:

The mouth of the just shall meditate wisdom
And his tongue shall speak judgment
Blessed is the man who endureth temptation
For once he hath been proven, he shall recieve
the crown of life

O Lord, fountain of holiness
O Lord, fire divine, have mercy

O how sacred
How serene
How benevolent
How lovely, this virgin who believeth

[Instrumental]

O Lord, fountain of holiness
O Lord, fire divine, have mercy

O how sacred
How serene
How benevolent
How lovely, O lily of purity 

Here is the video: 

Music Box Version: 

Saint Version: