Constance McManus

“It is a wise thing to be polite; consequently, it is a stupid thing to be rude. To make enemies by unnecessary and willful incivility, is just as insane a proceeding as to set your house on fire. For politeness is like a counter--an avowedly false coin, with which it is foolish to be stingy.”
― Arthur Schopenhauer, The Wisdom of Life and Counsels and Maxims

“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.”
― Bertrand Russell

“Rudeness is the weak man’s imitation of strength.”
― Edmund Burke