While one man can discover a certain thing by himself, another is never able to understand it, even if taught by means of all possible expressions and metaphors, and during a long period; his mind can in no way grasp it, his capacity is insufficient for it.
MaimonidesRelated topics
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I'm done with girls on rocks! I've painted them for thirteen years and I could paint them and sell them for thirteen more. That's the peril of the commercial art game. It tempts a man to repeat himself. it's an awful thing to get to be a rubber stamp. I'm quitting my rut now while I'm still able.
Maxfield Parrish
When you are into mathematics, you have been so high on the scale of complexity of reasoning that you are living in some kind of altered reality. You think everybody on the street is able to understand complicated reasoning [...]. And you get very frustrated, when you discover that's not the case.
Cédric Villani