There is a slight difference between dignity and ego. Self centred person says it's my dignity but in reality it's ego.. If you refuse even a little, he will torture you until you get tired of yourself. Then you are compelled to think that why am I here? Self centred person a Curse or a Blessing, It's a Enigma. It is very easy to write good ideas, but when it comes to implementing them, they become ordinary people.
"Be polite" is not the thing to say. First be humble yourself and then expect from others.... Knowledge is also written in a book, but unless you bring it to life, such knowledge is useless....