I heard this song for the first time tonight while watching an operatic musical from the 1930s.  The way that they sing it and the way that it just kind of tumbles....it's wonderful!  And the movie is HILARIOUS!  If anyone gets the chance to watch it, do!  It's amazing.
Ah!  The sweet mystery
Of life at last I've found thee
Ah!  At last I know the secret of it all!
 
All the longing, seeking, striving, waiting, yearning
The burning hopes, the joy and idle tears that fall
 
I've a very strange feeling I've never felt before 
'Tis a kind of grind of depression
 
My heart's aching strangly; it feels rather sore
At least it gives me that impression
 
My pulses leap madly without any cause
Believe me I'm telling you truly
 
I'm gay without pause
Then sad without pause
 
Yes, I'm falling in love with someone,
Plain to see
I'm sure I could love someone madly
If only someone would love me.
                                                                                    
                                                                                 --Naughty Marietta (1935)
I just love old movies/musicals!!!