[169] If therefore you mingle with your jestings any little stimulus which is in the least unwelcome or painful, so as to excite not only laughter but any feelings of bitterness, on the part of one who is always ready to suspect evil, you will be deliberately alienating from yourself a master who is very well inclined by nature to listen to any accusations which are brought before him in a joking manner; for his ears, as you well know, are always open, and are constantly on the watch to listen to all those who are in the habit of interweaving accusations of others with their sycophancy.