"I was trying to figure out why I don't like a lot of paintings and why I do like the ones I like, and the only thing I could think of was that the painters I like all manage to make their paintings seem infused with light, which is rather an odd thing to say about Van Gogh since his technique is so heavy. Most of the others I like are Impressionists or post-Impr., but when you look at his work, even though he just slathers the paint on, they do just seem to almost glow from inside."
How true. Look at this beautiful study by the Italian Impressionist Federico Zandomeneghi (1841-1917), "In Bed."
It's not the subject matter that so draws us to the painting; certainly we have seen people sleeping. The face of the young girl is almost obscured, so it is not her personal beauty that attracts us. Rather it is the quality of the light that invites us to speculate about the sleeping figure, and her dreams.