Changeling

... his own face enthralled him.
Each angle of it induced
a different impression.
It was a changeling's face,
and mirror-guided experiments
had taught him how to ring the changes,
how to look now ominous,
now impish,
now soulful;
a tilt of the head,
a twist of the lips,
and the corrupt gypsy
became the gentle romantic.
-- Truman Capote, "In Cold Blood"