Selected quotation
"Of all escape mechanisms, death is the most efficient."
~ Henry Louis Mencken, "A Book of Burlesques"
Various books with quotations, aphorisms and proverbs:
Chinese Proverbs
The Proverbs Driven Life: Timeless Wisdom for Your Words, Work, Wealth, and Relationships
Offerings: Buddhist Wisdom for Every Day (Offerings for Humanity)
Everyday Positive Thinking
The Yale Book of Quotations
America's Popular Sayings: Over 1600 Expressions on Topics from Beauty to Money and Everything In Between
The Oxford Dictionary of Quotations
101 French Proverbs
Doonesbury.com's The War in Quotes
Bartlett's Familiar Quotations: A Collection of Passages, Phrases, and Proverbs Traced to Their Sources in Ancient and Modern Literature (17th Edition)
8,789 Words of Wisdom
The Book of Positive Quotations, 2nd Edition