Visualizing - Hume

"I hear a present, for instance, a person's voice, with whom I am acquainted; and the sound comes as from the next room.  This impression of my senses immediately conveys my through to the person, together with all the surrounding objects.  I paint them out to myself as existing at present, with the same qualities and relations of which I formerly knew them possessed.  These ideas take faster hold on my mind, than ideas of an enchanted castle."- Hume

What I got out of this passage is Hume is talking about our visual imagination.  When people talk about people we already know we usually can picture them right away in our mind of either the last time we saw them or a favorite memory with them.  When we think of an enchanted castle like Hume said, it takes us a little longer to make up the image in our head.  We usually think of one from TV or a book we saw.  When something is real, we can picture it faster than something that is fiction.