Acharya Prashant explains that doing the right thing requires going against one's own nature, which acts as the primary challenge. He describes nature as the source of fear, attachment, and mechanical behaviors, comparing human reactions to those of animals driven by instinct. He emphasizes that true consciousness is absent in these mechanical cycles of nature, such as the instinctive bond between a mother and a crying child. He asserts that for a person to do what is right, they must be prepared to face internal resistance and the biological impulses that seek to stop them.