How is the role of the mirror of erised in saving the stone forshadowed?

The Mirror of Erised foreshadows the protection of the Philosopher's Stone by revealing the true desires of those who seek it. In "Harry Potter and the Philosopher's Stone," Dumbledore explains that the mirror shows not what one wants, but what one truly needs, highlighting the importance of selflessness. This theme is echoed when Harry, unlike Voldemort, approaches the Stone without selfish desires, ultimately making it possible for him to find and protect it. Thus, the mirror serves as a symbolic representation of the purity of intention required to safeguard the Stone.