When he saw any one in a mourning dress, though it might be an acquaintance, he would change countenance; when he saw any one wearing the cap of full dress, or a blind person, though he might be in his undress, he would salute him in a ceremonious manner.
见齐衰者，虽狎，必变。见冕者与瞽者，虽亵，必以貌。
Source: The Analects, Xiang Dang X, Chapter 16
Author: The Compilers
