“Human bipolarity was both the binding force and the driving energy for all human behavior, from sonnets to nuclear equations. If any being thinks that human psychologists exaggerate on this point, let it search Terran patent offices, libraries, and art galleries for creations of eunuchs.”

“Human bipolarity was both the binding force and the driving energy for all human behavior, from sonnets to nuclear equations. If any being thinks that human psychologists exaggerate on this point, let it search Terran patent offices, libraries, and art galleries for creations of eunuchs.”

— Robert A. Heinlein