The Way of Seeming gives the unreliable source of human belief. Humans believe in two opposites to all matter. All things have two forms like soft and hard or hot and cold. Parmenides believed that all existence is single. The Way of Seeming is the way humans see the world.
Immortals see the world as The Way Of truth.
The fundamental mistake of humans is that there is a minimum difference if reality when all reality is single. Though he criticized Pythagoras and his students, Parmenides was believed to have been influenced by the Pythagorean School since the Way of Truth has a very deductive method that would have been learned by Mathematicians. He was the Pupil of Xenophanes and the Pythagorean teacher named Ameinias. He criticized others often. Scholars have found in texts that attack other philosophers such as Anaximander, Anaximenes, Heraclitus, and the Pythagorean School.