knowledge is power. an old proverb to motivate people- graphic showing the brain in a lightbulb

anatomy biology body brain brainstorm brainy bulb cerebellum cerebral cerebro cerebrum communication concept cortex creativity flat frontal graphic head health human icon idea illumination illustration intellect intelligence knowledge light lightbulb medical medicine mind motivate motivational neurology old organ people physiology plug power proverb psychology quote sayings science showing system think thought vector