Selected quotation
"Politeness , n. The most acceptable hypocrisy."
~ Ambrose Bierce, "The Devil's Dictionary"
Various books with quotations, aphorisms and proverbs:
Best Quotations for All Occasions
Offerings: Buddhist Wisdom for Every Day (Offerings for Humanity)
Apronisms: Pocket Wisdom for Every Day
101 French Proverbs
America's Popular Sayings: Over 1600 Expressions on Topics from Beauty to Money and Everything In Between
Bartlett's Familiar Quotations: A Collection of Passages, Phrases, and Proverbs Traced to Their Sources in Ancient and Modern Literature (17th Edition)
Chinese Proverbs
The Proverbs Driven Life: Timeless Wisdom for Your Words, Work, Wealth, and Relationships
The Book of Positive Quotations, 2nd Edition
The Yale Book of Quotations
Everyday Positive Thinking
A Continual Feast: Words of Comfort and Celebration, Collected by Father Tim