21 Invaluable Investing Quotes

In the lead-up to Sept. 25's Worldwide Invest Better Day , The Motley Fool is reacquainting investors with the basic building blocks of investing. Here's the latest in our series of investing articles.

Why do the greatest investors have all the best lines? Is it just a coincidence?

We don't think so. Great investing and great communication are very similar in that both require focus, and the ability to decide what's important and what's not. Hedge fund manager Mark Sellers has said that it's no coincidence that Warren Buffett is a fine writer. If you can't write clearly, according to Sellers, then you can't think clearly.

So maybe it shouldn't surprise us that the best investors are also effective communicators. We enjoy learning from the investing greats, and have decided to share some of our favorite quotes from them. The Greek historian Plutarch, who also knew a thing or two about the power of words, once said that "the mind is not a vessel to be filled but a fire to be kindled." Below you'll find 21 investing quotes that have lit a fire in us. We hope you find them as valuable as we have.

1. "The ideal business is one that earns very high returns on capital and that keeps using lots of capital at those high returns. That becomes a compounding machine."
-- Warren Buffett

Finding compounding machines is hard. But once you find them, they do all of the hard work for you, year in and year out. That's why investing for the long term in companies with sustainable competitive advantages builds wealth.

2. "It takes twenty years to build a reputation and five minutes to ruin it. If you think about that, you'll do things differently."
-- Warren Buffett

Sadly, there are far too many examples of this principle in contemporary business.

3. "You don't need to be a rocket scientist. Investing is not a game where the guy with the 160 IQ beats the guy with 130 IQ."
-- Warren Buffett

Whew! This is good news, since we're pretty sure our IQs aren't particularly high.

4. "When we own portions of outstanding businesses with outstanding managements, our favorite holding period is forever."
-- Warren Buffett

In an era of high-frequency trading, where the average holding period is just four months, a long-term view can give the average investor a huge advantage.

5. "The key to investing is not assessing how much an industry is going to affect society, or how much it will grow, but rather determining the competitive advantage of any given company and, above all, the durability of that advantage."
-- Warren Buffett

This is advice we've taken to heart. That's why we've made an investment in online travel research company TripAdvisor (TRIP) . This well-managed company continues to grow, and we're confident it can maintain that advantage for years.