"No estimate is more in danger of erroneous calculations than those by which a man computes the force of his own genius."

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When confronted with information streaming from the eyes, the brain will interpret this information in the quickest and most efficient way possible. Time is energy. The longer the brain spends performing some calculation, the more energy it consumes. Considering the brain runs on about 40 watts of power (a lightbulb!), it doesn't have a lot of energy to spare.

— Gregory Berns