To poverty I owe the fact that I never went to college. I spent those four years in the school of experience instead of the school of theory.
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We do not receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us.
Marcel Proust — In Search of Lost Time
Invert, always invert. Many hard problems are best solved by asking: what would guarantee failure? Avoid that, and success becomes far more likely than if you'd chased it directly.
Charlie Munger — Poor Charlie's Almanack
The best way to think about how markets work is to imagine a voting machine in the short run and a weighing machine in the long run — but most people spend their entire careers trying to win votes instead of actual weight.
Benjamin Graham — The Intelligent Investor (paraphrased in subsequent commentary by Graham himself)