Courtesy on one side can never last long.

Less of your courtesy and more of your purse.

Politeness travels on short fares.

A favor ill – placed is great waste.

He who sows courtesy reaps friendship, and he who plants kindness gathers love.

The only way to treat a Prussian is to step on his toes until he apologizes.

To speak kindly does not hurt the tongue.

Good nature without prudence, is foolishness.