First of all, in the 1960s and 70s no-one knew what artists were singing as lyrics, it added to the mystery and ability to play on words. But I am quite certain this should be SOLE SOLE (Italian), and then "Soleil Soleil" (French) in the lyrics - meaning "SUN". The Egyptian Sun symbol was very important to artists back then, as it signified a return to spiritual principles, etc - and the song connects it perfectly: "I was sad, until (my) Sun came back" - also referring to Love Divine (soulmate).
First of all, in the 1960s and 70s no-one knew what artists were singing as lyrics, it added to the mystery and ability to play on words. But I am quite certain this should be SOLE SOLE (Italian), and then "Soleil Soleil" (French) in the lyrics - meaning "SUN". The Egyptian Sun symbol was very important to artists back then, as it signified a return to spiritual principles, etc - and the song connects it perfectly: "I was sad, until (my) Sun came back" - also referring to Love Divine (soulmate).