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One of our greatest canards, or lying myths , is that we "use only 10% of our brains." How do we know that this is true? How did this canard originate ? Did someone measure a brain's latent utilization capacity and then promptly publish their findings with demonstrated proof, in peer-reviewed journals? Or did, instead, the myth's prime mover have had a divine revelation during a fast or sleep or lightening strike? The popular canard makes no sense, whatever, arbitrarily quantifying or what is perforce unquantifiable like intelligence, which comes from our infinite Divine Creator!
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https://en.m.wikipedia.org/wiki/Ten_percent_of_the_brain_myth