injure one's reputation

Here are placards on the walls, which, your guide will tell you, if you are not conversant with the Chinese tongue, bear on them sentences from the writings of Confucius, Mencius, and others, with exhortations to do nothing against integrity or virtue, to venerate ancestors and to be careful not to injure one's reputation in the eyes of Americans;—all of which is most excellent advice, and worthy of the attention of men everywhere.