Unlike surgery or engineering, success in finance depends more on behavior than intelligence. A disciplined amateur who controls greed and fear can outperform a PhD from MIT who makes poor behavioral decisions. This highlights that temperament is the most critical variable for long-term financial success.

True investment prowess isn't complex strategies; it's emotional discipline. Citing Napoleon, the ability to simply do the average thing—like not panic selling—when everyone else is losing their mind is what defines top-tier performance. Behavioral fortitude during a crisis is the ultimate financial advantage.

While her peers used leverage, Green consistently stockpiled cash. During the panics of 1890 and 1907, when credit dried up and assets were cheap, her liquidity was her ultimate weapon. It enabled her to buy entire towns, save banks, and lend to powerful men on Wall Street, turning systemic crisis into personal opportunity.

When Green trapped a short-seller, she could have financially ruined him. Instead, she charged a modest premium because he had always treated her respectfully. This demonstrates a strategic choice to preserve reputation over maximizing a single transaction, a rare tactic among the Gilded Age's ruthless barons.

Contrary to popular belief, the 1929 crash wasn't an instantaneous event. It took a full year for public confidence to erode and for the new reality to set in. This illustrates that markets can absorb financial shocks, but they cannot withstand a sustained, spiraling loss of confidence.

Distinguish between everyday impulses (often unreliable) and true intuition, which becomes a powerful survival guide during genuine crises. Our hardwired survival mechanisms provide clarity when stakes are highest, a state difficult to replicate in non-crisis situations.

The true value of a large cash position isn't its yield but its 'hidden return.' This liquidity provides psychological stability during market downturns, preventing you from becoming a forced seller at the worst possible time. This behavioral insurance can be worth far more than any potential market gains.

The best investment deals are not deeply discounted, low-quality items like "unsellable teal crocodile loafers." Instead, they are the rare, high-quality assets that seldom come on sale. For investors, the key is to have the conviction and preparedness to act decisively when these infrequent opportunities appear.

Warren Buffett's early partner, Rick Gurren, was as skilled as Buffett and Munger but wanted to get rich faster. He used leverage, got wiped out in a market downturn, and missed decades of compounding. This illustrates that patience and temperament are more critical components of long-term success than raw investing intellect.