As I explained, Plato believed that reality is divided into two regions. One region is the world of the senses, about which we can only have approximate or incomplete knowledge by using our five (approximate or incomplete) senses. In this sensory world, ‘everything flows’ and nothing is permanent. Nothing in the sensory world is, there are only things that come to be and pass away. The other region is the world of ideas, about which we can have true knowledge by using our reason. This world of ideas cannot be perceived by the senses, but the ideas (or forms) are eternal and immutable.
