Fragment 164

164. Living beings naturally associate with those like themselves—doves with doves, cranes with cranes, and so with all animals. The same occurs among inanimate things, as can be seen when seeds are sifted or pebbles are shaped by the sea: beans gather with beans, barley with barley, wheat with wheat; and on beaches, oval stones roll together with oval, round with round, as if likeness itself exerted a force drawing them together.