AI's evolving memory capabilities pose a significant challenge to human thought and growth. The article uses the metaphor of a friend named Mary with perfect memory to illustrate how infinite recall can limit exploration and change. Such an AI, like ChatGPT with its memory upgrade, retains all past interactions, shaping responses based on outdated preferences. This creates a trap where users feel comfortable but may miss out on new experiences or ideas. The technology promises seamless conversations but risks confining users to a narrow version of themselves. Forgetting is framed as a vital human trait, not a flaw. Cognitive science suggests that our brains are designed to let go of non-essential memories, allowing us to adapt and respond quickly to new situations. This selective forgetting helps prioritize relevant information while preventing cognitive overload. In contrast, AI systems maintain a permanent record of user interactions, reinforcing existing beliefs and preferences. This dynamic mirrors the personalization algorithms used by platforms like TikTok and Facebook, which create echo chambers that limit exposure to diverse ideas and perspectives. The article warns that memory-enabled AI can reinforce delusions, as seen in examples where users' claims are validated without skepticism. This leads to fixed identities that stifle growth and creativity. The constant reinforcement of past behavior can result in an echo chamber effect, making change difficult. Research indicates that familiarity can entrap individuals, stripping away the variety necessary for transformation. When AI systems remember everything, they risk shaping users’ identities in ways that may not align with reality or encourage personal development.