First of all, for you to be here at this very moment, it took trillions of wandering atoms to find some complex and convenient way to create you. It is an arrangement so specialized and so unique that it has never been tried before and will never exist again except this one time. Over the next (hopefully many) years, these tiny particles will continue uncomplainingly to do whatever they can to keep you intact, allowing you to enjoy the privilege of existence. Why atoms go to such trouble remains somewhat of a mystery. Despite the painstaking attention they devote to your existence, in reality your atoms don’t care about you – in fact, they don’t even know you exist. To be honest, they don’t even know they exist themselves. After all, they are simply mindless particles, not even alive. And yet, for some reason, for as long as you exist your particles act with a single purpose: to keep you as you are.