Selected quotation
"There are three ways to obtain wealth: inheritance, luck, and hard work. None is guaranteed, but you have no influence over the first two."
~ Anon.
Various books with quotations, aphorisms and proverbs:
Bartlett's Familiar Quotations: A Collection of Passages, Phrases, and Proverbs Traced to Their Sources in Ancient and Modern Literature (17th Edition)
The Yale Book of Quotations
The Proverbs Driven Life: Timeless Wisdom for Your Words, Work, Wealth, and Relationships
Doonesbury.com's The War in Quotes
The Oxford Dictionary of Quotations
Apronisms: Pocket Wisdom for Every Day
Great Quotes from Great Leaders
101 French Proverbs
Everyday Positive Thinking
A Continual Feast: Words of Comfort and Celebration, Collected by Father Tim
The Most Brilliant Thoughts of All Time (In Two Lines or Less)
Oxymoronica: Paradoxical Wit & Wisdom From History's Greatest Wordsmiths