Parmenides of Elea was born in around 515BC, and he proposed that change is an illusion. He said that everything which exists is a being and that the one common thing between all things that exist is that they are-they are all being. So if something is not being, it does not exist, and therefore is nothing. So you have being and nothing. Parmenides held that for change to come about, being has to come together with something other than being (which is nothing), and therefore change is impossible and an illusion. Parmenides also held the view that fundamentally reality is one, unchanging being. This is because, he argued, everything is being, whether it is a chair or a cat or a person, it is all being and so reality is one. Change is merely an appearance, then, and Parmenides thought that it is our senses that deceive and trick us into thinking that things change. He wrote about this idea in his poem, On Nature, and wrote about what is real in the part called the ‘way of truth’ and appearances in the ‘way of opinion’. Parmenides influenced many, including the atomist Democritus and Plato.