We don't see the world as it is. We see the world through mental maps that we've constructed over a lifetime of experience. And the problem with mental maps is that they can become outdated — they can lead us astray in a world that has changed, or in situations that are different from those in which the maps were formed.
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We deceive ourselves if we imagine that we can ever be passive, impartial observers. Every perception, every scene, is shaped by us, whether we intend it or know it, or not. We are the directors of the film we are making — but we are its subjects too: every frame, every moment, is us, is ours.
Oliver Sacks
Risk means more things can happen than will happen. The practical definition of risk is not volatility or a standard deviation — it's the possibility of permanent loss of capital. Volatility is opportunity dressed in frightening clothes.
Howard Marks — The Most Important Thing: Uncommon Sense for the Thoughtful Investor
Intelligence is a conversion ratio, with an optimality bound. Increasing intelligence is not so much like "making the tower taller", it's more like "making the ball rounder". At some point it's already pretty damn spherical and any improvement is marginal.
Francois Chollet