〈Cursum Perficio〉 (1988), sung by Enya (Eithne Ní Bhraonáin, b1961)
The lyrics is in Latin, and is written by Roma Ryan.
Here's the lyrics, in Latin, with English translation, from the official site http://www.enya.com/lyrics_watermark.php.
Cursum perficio Verbum (sat) sapienti eo plus cupiunt Quo plus habent, eo plus cupiunt Post nubila, Phoebus (in) aeternum
…my journey ends here… …a word is enough for the wise; the more one has, the more he desires… …after the clouds, the light… …forever…
The song reminds me of Lilium (Elfen Lied).