A prompt refusal has in part the grace of a favor granted.
Latin Proverbs
Never give advice unasked.
German proverbs
Better silence than ill speech.
Swedish proverbs
Be courteous to all, but intimate with few, and let those few be well tried before you give them your confidence.
George Washington
Be calm in arguing; for fierceness makes error a fault, and truth discourtesy.
George Herbert
Courtesy is as much a mark of a gentleman as courage.
Theodore Roosevelt
To say nothing, especially when speaking, is half the art of diplomacy.
Will Durant
Whether it's eight o'clock in the morning or eight o'clock at night, I always try to greet others before they have a chance to speak to me.
Zig Ziglar
It's good sportsmanship to not pick up lost golf balls while they are still rolling.
Mark Twain
I didn't attend the funeral, but I sent a nice letter saying I approved of it.