Sri Lanka Matha is another melodious slow paced anthem with peaceful words and rhythms.
http://www.youtube.com/watch?v=TsnXapGlBBg is my fav version
and the best parts are the 8 lines from
Obave apa vidya
Obamaya apa sathya
Obave apa shakthi
Apa hada thula bhakthi
Oba apa aloke
Apage anu prane
Oba apa jeevanave
Apa mukthiya obave
Even in Sinhalese they are pretty self explanatory