"I deem that to be perception . Monads perceive. But monads act as well. If we could transport ourselves much closer to Saturn, and get into the sphere of influence of its moon Titan, my fingernail, along with the rest of me, would fall into it—which is a sort of collective action that my monads take in response to their perception of Titan. So, your highness: What do we know of monads thus far?"