Eases my nerve

This tune in my head just goes round and round... Is it because of the weather? Because of my overall psychological state of mind? Because of the fact that donkeys kill more people than plain crashes? I really can't put my finger on it... but it goes a little something like that:
"Seitse surmapattu,
vihm on lakkamatu,
juba seitsmes päev... sajab.
Rahustab mu närvi,
seitse spektrivärvi... vikerkaar..."
(Tõnis Mägi - Vikerkaar)
*
(translating the untranslatable)
Seven deadly sins,
Rain is so constant,
On the seventh day... sill pouring.
Eases my nerve,
seven colours of spectrum... rainbow..."
(Tõnis Mägi - Rainbow)

This song relaxes me...