“Good manners and bad breath will get you nowhere.”
“You need a good bedside manner with doctors or you will get nowhere.”
“Good manners are appreciated as much as bad manners are abhorred.”
“You don't get to be the president of anything if you have bad manners.”
“Good manners open the closed doors; bad manners close the open doors!”
“The real test of good manners is to be able to put up with bad manners pleasantly.”