soulfulness       
noun [ U ] uk/ˈsəʊl.fəl.nəs/ us/ˈsoʊl.fəl.nəs/
 深情
the quality of expressing deep feelings
  When you look at the guy's eyes, you can see the soulfulness of his face. 当你望着那个人眼睛时,你能看到他的一脸深情。 
 There's a depth and a soulfulness to these songs.  这些歌曲有内涵有灵魂。 
 See: soulful
 - More examples
 - The music has a sympathetic warmth mixed with a carefree and somewhat nostalgic soulfulness.
 - I needed an actor who has some real depth, and some soulfulness.
 - The thing I miss in a lot of younger painters is the passion and soulfulness.