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In one talk (Practical Thought About Practical Thought?), Charlie even takes on the challenge of building, from scratch, a two-trillion dollar business, and then walks us through his diverse mental models to accomplish that mighty feat.

The quotes, talks, and speeches presented here are rooted in the old-fashioned Midwestern values for which Charlie has become known: lifelong learning, intellectual curiosity, sobriety, avoidance of envy and resentment, reliability, learning from the mistakes of others, perseverance, objectivity, willingness to test one’s own beliefs, and many more. But his advice comes not in the form of stentorian admonishments; instead, Charlie uses humor, inversions (following the directive of the great algebraist, Jacobi, to “Invert, always invert”), and paradox, to provide sage counsel about life’s toughest challenges.

Charlie also employs historical and business case studies to great effect. In these presentations, he makes his points with subtlety and texture, often using a story-like context instead of abstract statements of theory. He regales his audience with humorous anecdotes and poignant tales, rather than with a blizzard of facts and figures. He well knows, and wisely exploits, the traditional role of the storyteller as purveyor of complex and detailed information. As a result, his lessons hang together in a coherent “latticework” of knowledge, available for recall and use when needed.

It is clear throughout these talks and speeches that Charlie places a premium on life decisions over investment decisions. His mental models, drawn from every discipline imaginable, recur repeatedly and, in no way, focus on “business portfolio strategy” or “beta” or “Cap M.” Rather, they center on fundamental truth, human accomplishment, human foibles, and the arduous path to wisdom. Charlie once said, “I wanted to get rich so I could be independent, like Lord John Maynard Keynes.” Independence is the end that wealth serves for Charlie, not the other way around.