> The title is taken from the Welsh song Calon Lân, in translation:  
>   *I don’t ask for a luxurious life,*  
>   *The world’s gold, or its fine pearls:*  
>   *I ask for a happy heart,*  
>   *An honest heart, a pure heart.*  

> The title of the song, in translation, is A Pure Heart, but it contains the words A Happy Heart.
> My dancing has given me a happy heart for most of the time I have been doing it.