Show respect even to people who don’t deserve it; not as a reflection of their character, but a reflection of yours ~ Dave Willis

Manners are a sensitive awareness of the feelings of others. If you have that awareness, you have good manners, no matter what fork you use ~ Emily Post
Rudeness is the weak man’s imitation of strength.” —Eric Hoffer
Speak with caution. Even if someone forgives harsh words you’ve spoken, they may be too hurt to ever forget them. Don’t leave a legacy of pain and regret of things you never should have said.” —Germany Kent
Life is not so short but that there is always time enough for courtesy.” —Ralph Waldo Emerson