- The Mirror of Erised is an enchanted mirror that can reflect what you want. And the word “Erised” is spelled backward from the word “Desire”.
- Harry’s first reaction to Snape is to ask, “Who is he?” His final impression is that Snape is “the bravest man I’ve ever seen.”
- In the first potion lesson, Snape asks Harry, “What would I get if I added powdered root of asphodel to an infusion of wormwood?” The Victorian Flower Language says that asphodel is a type of lily, which means “My regrets follow you to the grave.” Wormwood, on the other hand, means “absence” and is also a symbol of bitter sorrow.
- Dumbledore’s speech at the first ceremony was short and sweet, ending with the memorable line, “Nitwit! Blubber! Oddment! “Tweak!” NITWIT represents Ravenclaw. They’re intelligent, so they think the others are dumb. BLUBBER represents Gryffindor. They think the others are less athletic, so they’re called blubbers, which means fat. ODDMENT represents Slytherin. It means “an invaluable fabric,” which they see others as oddment, not as being as good as them. TWEAK represents Hufflepuff. They think the other houses need to make some adjustments.
- Fred and George Weasley threw a snowball at Professor Quirrell’s back, which effectively means they threw Voldemort a snowball.
- When Harry saw Snape, he immediately felt a burning sensation in his scar. This is because Professor Quirrell is turning back and Voldemort is facing him.
- The day that Hermione, Ron, and Harry became friends was the tenth anniversary of Lily and James Potter’s death.
- In Prisoner of Azkaban, Harry discovered that his father was an Animagus. Garrick Ollivanders said that James Potter’s wand is great for transfiguration in Philosopher’s Stone.
- In Prisoner of Azkaban, Marge Dursley shows up and embarrasses Harry Potter. She first appears in Philosopher’s Stone, when Vernon Dursley thought about letting Harry Potter stay at his house.
- In Prisoner of Azkaban, Sirius Black makes an appearance as a wanted criminal. He let Hagrid ride his motorcycle to pick up Harry.
- In Half Blood Prince, Zabini Blaise seems to be one of the students who wasn’t old enough to take the Apparition test. He’s the last to get sorted on Philosopher’s Stone.
- In Half Blood Prince, Harry saves Ron by shoving the bezoar down to his throat. Snape taught Harry in Philosopher’s Stone in the first lesson.
- In Deathly Hallows, Kreacher asked Harry if he wanted the treacle tart. This is the first dessert he chose in the ceremony.