Fantastic Beasts: The Secrets of Dumbledore exposes Albus Dumbledore's hypocrisy in Harry Potter. The second trailer for Fantastic Beasts 3 opens with a much older Dumbledore gazing into his Pensieve as his voiceover says, "Memory is everything. Without it we are blind. Without it we leave the fate of the world to chance." It's likely that he's recalling his own past with Gellert Grindelwald in this scene, since the two inevitably parted ways before their infamous duel, but these remarks also make Dumbledore's older self appear even more hypocritical.
Throughout the original Harry Potter movies, Dumbledore kept most of his own history a secret. He disclosed so little about himself that after his death, details about his backstory were quickly in a bestseller biography meant to shock the entire wizarding world. Harry, who had come to trust Dumbledore completely, was blindsided by some of these revelations, thus making Dumbledore's stance in the Fantastic Beasts 3 trailer all the more confusing.
Related: Fantastic Beasts 3: Dumbledore & Grindelwald's Duel Is A Big Retcon Threat
Despite Dumbledore's declaration of memories' importance in Fantastic Beasts 3, he effectively hid his own in the original Harry Potter series. Dumbledore never disclosed his relationship with Grindelwald or anything about his family, preferring to shroud himself in secrecy as much as possible. His attachment to the Pensieve — capable of holding a person's memories — proves his commitment to hiding from his own past. It would have allowed Dumbledore to unburden himself of painful memories by unloading them into the basin for as long as he wished. His extreme level of secrecy in the Harry Potter movies, during which he withheld information to a
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