Selected quotation
"A weak man has doubts before a decision, a strong man has them afterwards."
~ Karl Kraus
Various books with quotations, aphorisms and proverbs:
Chinese Proverbs
8,789 Words of Wisdom
America's Popular Sayings: Over 1600 Expressions on Topics from Beauty to Money and Everything In Between
Everyday Positive Thinking
The Proverbs Driven Life: Timeless Wisdom for Your Words, Work, Wealth, and Relationships
The Wise and Witty Quote Book: More than 2000 Quotes to Enlighten, Encourage, and Enjoy
Oxymoronica: Paradoxical Wit & Wisdom From History's Greatest Wordsmiths
Best Quotations for All Occasions
The Book of Positive Quotations, 2nd Edition
The Most Brilliant Thoughts of All Time (In Two Lines or Less)
Apronisms: Pocket Wisdom for Every Day
Bartlett's Familiar Quotations: A Collection of Passages, Phrases, and Proverbs Traced to Their Sources in Ancient and Modern Literature (17th Edition)