Acharya Prashant explains that external actions of others can only affect an individual if they are given permission or importance. He uses the analogy of a chimpanzee in a zoo; if one stays away from its enclosure, its actions cannot cause harm. Similarly, people can only dominate or trouble someone if that person has tied their self-interest to them or granted them the status of a master. He emphasizes that without personal consent, nothing can truly impact the inner self. A saint is defined as someone who remains unaffected by foolish or useless words, as if those words never occurred in their world.