Acharya Prashant explains that destiny undoubtedly exists as the collection of external situations and biological factors beyond an individual's control, such as the circumstances of one's birth, physical traits, and universal events. He defines destiny as anything that happens outside the domain of free will, including the body itself, which he considers external to the core self. However, he emphasizes that while destiny is a significant force, it is entirely powerless compared to the force of intelligence and understanding residing at the human center. Destiny can influence outer events and the physical body, but it can never touch or dictate the core response of an individual who has found their true self.