"He is someone who knows, from the very beginning, what a good explanation is. Nobody taught him this. He simply knows. He loves it when an explanation fits firmly into place, leaving no space at all. When he understands why something is the way it is, why it has to be that way, the knowing feels like pleasure to him, like a laughing in his mind. And when explanations are bad, he feels it almost like a physical pain, like some small animal gnawing at his chest."
Rebecca Goldstein, Betraying Spinoza.