It is never prudent to prattle on about yourself or call too much attention to your actions.
You stir up enough envy among your peers to induce treachery and backstabbing.
Be careful in trumpeting your own achievements, and always talk less about yourself than about others.
It is a wise thing to be polite; it is a stupid thing to be rude.
To make enemies by unnecessary and wilful incivility is just as insane as to set your house on fire.
Politeness is like a false coin. It is foolish to be stingy.
A sensible man will be generous with it....