What are some quotes about being nice?

"A true friend is someone who says nice things behind your back."

"Maybe you don't like your job, maybe you didn't get enough sleep, well nobody likes their job, nobody got enough sleep. Maybe you just had the worst day of your life, but you know, there's no escape, there's no excuse, so just suck up and be nice." -Ani Difranco

"A person who is nice to you, but rude to the waiter, is not a nice person" - Dave Berry There's the old proverb, "Nice guys finish last."