" So much went on in this small mass,” Morris murmured. “Thoughts, ideas, music, desires, poetry, anger, hate. People speak of the heart, Lieutenant, but it’s the brain that holds all the magic and mystery of the human species. It elevates us, separates us, defines us as individuals. And the secrets of it—well, it’s doubtful we’ll ever know them all. "

― J.D. Robb , Rapture in Death (In Death, #4)