oil on canvas, c. 1921.
The wind from the north flings fine ground glass at my windows this morning and moans in melancholy and madness among the boughs of the dark spruce beside my back door.
Early morning in late winter is like a worn and faded negative of its former self.
Szelsofa asked me to expand on the use of italics to indicate a character's internal thoughts.
The first guide I use for italics is based on the premise that their fundamental purpose is emphasis.
I think this guide applies to both first and third person narratives.
In third, a character's private thoughts are often introduced or followed by phrases such as "he thought, she wondered," etc. -- though proper flow of narrative doesn't require those tags, and I prefer to see them omitted where possible.
If we write:"Janet stepped back in surprise. What was he doing here?"
the reader automatically assumes the question is Janet's thought upon another character's unexpected appearance. No tag and no italics necessary.
However, if the writer wishes to emphasize that the second character's arrival is to Janet a particularly shocking or pivotal event, the lines might read: "Janet stepped back. What was he doing here?"
(Yeah, yeah, I know. Nearly the same effect could be produced by simply italicizing he, as in "Janet stepped back. What was he doing here?" But that's a choice of style and voice and not the point.)
In either first or third, I like any telepathic (paranormal) communication set off by italics. In such cases, italics are used more to avoid confusion about who is thinking/saying what than to indicate emphasis.
In first person, all ruminations are assumed to belong to narrator, but italics still may provide a valuable role in emphasizing a particular thought.
As the case where Lillie meets a bean sidhe ( phoenetically, banshee) in the laundromat:
"She closed the lid of her washer and walked away, her red running shoes making small slapping sounds on the tile floor, like wet wool on river stones. The russet hair flowing down her back was as long as mine.
She paused and looked back over her shoulder. I could barely hear her over the rush of water filling the machines.
"No curse runs with power forever, Cousin, for the dead are grateful for rest. Even those from the small barrows.
I don't remember trundling home."