When we come to Parmenides and try to make sense of his work in On Nature, we should try to figure out what he was trying to do. I have my own idea. Let us first look at a little of what Parmenides says,
First, know that It Is, and it is not possible
For It not to be. This is the way of Persuasion,
Who dwells with Truth,. Next, the other, that It Is Not,
Cannot be. That is a path not to tread upon.
You cannot know what is Not, nor speak about it.
Richard G. Geldard, Parmenides and The Way of Truth, page 23
What could he be doing?