"I can calculate the motions of heavenly bodies, but never the madness of crowds," said Sir Isaac Newton, the inventor of calculus and discoverer of Newton's Laws, who lost his entire fortune in a 17th century investment scam called "the South Sea Bubble."
"We have not been investing this year, we have been on a battleground," said noted UK hedge fund manager Crispin Odey.
"We are in the ninth year of an economic expansion and the ninth year of a bull market. Investors are at a crossroads now, whether to hold cash or stocks," said Tom Lee, cofounder of Fundstrat Global Advisors.
"My experience in business helps me as an investor, and my investment experience makes me a better businessman," said Oracle of Omaha, Warren Buffett.
"The car business is hell," said Tesla co-founder Elon Musk, when announcing he would sleep in the Fremont, CA, Tesla factory until Model S production reaches 2,500 units a week.
"It's a terrible mistake to own something, just because somebody else owns it, even if that other person is Benjamin Graham, the dean of investing," said Oracle of Omaha, Warren Buffett.
"A fool learns from experience. A wise man learns from the experience of others," said Otto von Bismarck, the first Chancellor of Modern Germany.
"Let us endeavor so to live that when we die, even the undertaker will be sorry," said the 19th century American humorist Mark Twain.
"Getting information off the Internet is akin to trying to sweep back the ocean with a broom," said Ray Kurzweil, director of engineering at Google.
"Far more money has been lost by investors preparing for corrections, or trying to anticipate corrections, than has been lost by corrections themselves," said the legendary Fidelity money manager, Peter Lynch, who once told me I was the dumbest broker he had ever met.