Complex sentence: Furthermore Beyerstein (1995) believed that NLP has helped popularize myths about the brain and neurology and that that the aphorism "you create your own reality" promotes an epistemologically relativistic perspective, the purpose of which is to gain immunity from scientific testing.
Split into simpler sentences: Furthermore Beyerstein (1995) believed that NLP has helped popularize myths about the brain and neurology. He believes that the aphorism "you create your own reality" promotes a relativistic perspective and only seeks to gain immunity from scientific testing.