Voldemort's obsession with blood purity signifies his aim to rid the wizarding world of Muggle (non-magical) heritage and to conquer both worlds, Muggle and wizarding, to achieve pure-blood dominance.
First, Voldemort wanted to rid the wizarding world of any non pure blood wizards. He considered “tainted” blood (muggle blood) to be weaker than magic blood. Second, Voldemort wanted the wizarding world to rule over all the muggles. Kill them, enslave them, and whatever else occurred to him.
Voldemort always feared death – as an 11-year-old he scorned his mother for succumbing and dismissed it as weakness – and his Horcrux journey was all about achieving immortality, keeping himself alive with no thought for anyone else or even his own soul.
The reason why he assaulted the school is because the resistance and Harry were there who were not only fighting against him but also destroying his Horcruxes. Voldemort liked Hogwarts and considered it his home. However he loved himself and his power and control much more. That's why he attacked the school.
Riddle ultimately changed his name, by way of an anagram, from "Tom Marvolo Riddle" to "I am Lord Voldemort", as a way of removing his own heritage and of exalting himself, and he killed the Riddle family, partly because they were Muggles, and partly because they abandoned him and his mother.
However, the prophecy went on to say that Voldemort would mark the child as his equal, choosing the boy that he believed would be the most dangerous to him. Dumbledore believes Voldemort chose Harry because Harry was a half-blood, just like Voldemort.
His viciousness to Muggle-borns is connected: Riddle may be half-blood, but Muggle-borns can claim no wizarding heritage, therefore to him they are as low as Muggles themselves. Riddle also hates Muggles because they remind him of his childhood and the Muggle father who deserted him.
They both came in Voldemort's way and hence got killed in order to protect Harry. It should be noted that even if the prophecy didn't exist he would have wanted them killed anyway since they were prominent members of the Order of the Phoenix. The prophecy only made it a priority and made him want to personally do it.
Voldemort's desire to beat death and become immortal was also why he and Quirrell ended up slaying innocent unicorns. Drinking the blood of a unicorn would keep someone alive – even if they were an inch from death. However, it is considered an act of evil to kill something so pure.
Because Voldemort contains Harry's blood, as long as Voldemort is alive he preserves Lily Potter's charm, so Harry can't die at his hand. Thus, paradoxically, while Harry had to die before Voldemort could, Harry can't die while Voldemort lives.
Voldemort's Return Mirror's Harry Potter's Growth
However, what made him different this time was that Harry's blood meant he was no longer protected from Voldemort's touch. Proving this, he touched Harry's scar, causing him to scream out in pain.
Voldemort's greatest fear is death and as a result a boggart takes the form of his own corpse. It is unsurprising that this is Voldemort's biggest fear. After all, he did split his soul up encasing it in various horcruxes just so to keep himself from dying.
This is because when he aimed the Killing Curse towards Harry, the soul of Voldemort that was inside Harry (caused by events of baby Harry) got destroyed! Since most of the other horcruxes were already destroyed, he was become weaker in terms of soulness...
' Dumbledore chose to spend his life teaching, protecting and empowering others. He seems to have clearly made the choice to set aside "power" after the events surrounding the death of his sister, Ariana. Hunting down Voldemort would have been a overt act of power, something that he had spent his entire life avoiding.
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He had nothing but respect for Dumbledore, and it can be argued that Dumbledore was one of the greatest motivators in Voldemort's life.
Voldemort hugged Draco as an improvisation and it wasn't planned. Even Tom Felton (Draco Malfoy) was caught unaware which increased the effect. In Harry Potter style, it was like a welcome for Draco, but as Voldemort had never known love, he didn't know how to hug him very well. Thats why they had the awkward hug.
After he regains his body in the fourth book, Rowling describes Voldemort as having pale skin, a chalk-white, skull-like face, snake-like slits for nostrils, red eyes and cat-like slits for pupils, a skeletally thin body and long, thin hands with unnaturally long fingers.
Quirrell's body manifests burns and blisters during his fight with Harry due to the protective power Harry's mother left in his skin when she died for him.
Narcissa's greatest moment, however, was when she chose to betray Voldemort in Harry Potter and the Deathly Hallows. Not knowing whether Draco was alive or dead, Narcissa chose to lie to the Dark Lord rather than risk losing her son.
As Rowling explained in a series of tweets, Snape loved Harry's mother, Lily, and his unrequited affection drove him to resent Harry's father, James — and by extension, Harry himself.
Sybill Trelawney
James and Lily were in the original Order of the Phoenix and therefore knew they were risking their lives in the war against Voldemort. Still, the Dark Lord's whole reason for trying to kill them all was to eliminate the threat posed by a certain prophecy.
Dumbledore believed that he knew what was best for everyone, whether it be using Snape's guilt and grief to turn him to the Light side or lying to Harry to protect him from knowledge of his fate.
He has grown afraid of Harry's connection to Voldemort. Perhaps Voldemort, knowing Dumbledore's love for Harry, would possess Harry and provoke Dumbledore to kill him. So, Dumbledore attempted to avoid Harry throughout Book 5 for Harry's own good.
Lucius Malfoy had a strong dislike of Albus Dumbledore. This is due to two reasons – Dumbledore believed in Muggle rights which contradicted Malfoy's pure blood beliefs. In addition, Lucius was a Death Eater, so he believed that Lord Voldemort was a much more powerful wizard than Dumbledore.