Selected quotation
Better mad with the rest of the world than wise alone.
Baltasar Gracian, "The Art of Worldly Wisdom"
Various books with quotations, aphorisms and proverbs:
The Wise and Witty Quote Book: More than 2000 Quotes to Enlighten, Encourage, and Enjoy
Apronisms: Pocket Wisdom for Every Day
A Continual Feast: Words of Comfort and Celebration, Collected by Father Tim
The Most Brilliant Thoughts of All Time (In Two Lines or Less)
8,789 Words of Wisdom
101 French Proverbs
Everyday Positive Thinking
America's Popular Sayings: Over 1600 Expressions on Topics from Beauty to Money and Everything In Between
Chinese Proverbs
The Yale Book of Quotations
Bartlett's Familiar Quotations: A Collection of Passages, Phrases, and Proverbs Traced to Their Sources in Ancient and Modern Literature (17th Edition)
The Proverbs Driven Life: Timeless Wisdom for Your Words, Work, Wealth, and Relationships