Some songs just moisten my eyes

I can't diagnose and ascertain the major reason to this peculiarity. There are some songs which when i hear make my eyes wet. As much i can guess it's a blend of nostalgia and grief. The grief that was unavoidable but it's after-effects have been beautiful. The nostalgia pertaining to the days when i heard Kenny G for the first time.One such song is "the Moment" by Kenny G.
Kenny Bruce Gorelick is a magnificent and matchless saxophone player. And whenever i get time i listen to his music. His opera sometimes are my lullaby and sometimes make me cry...