In Greek mythology, the story of Narcissus illustrates the themes of vanity and self-love. Narcissus, a handsome youth, becomes infatuated with his reflection in a pool of water, ultimately leading to his demise. Unable to tear himself away, he pines away, transforming into a flower after his death. This tale serves as a moral caution against excessive self-obsession, highlighting the importance of maintaining healthy relationships and connections with others.