Hermione Granger: She's only interested in you because she thinks you're the Chosen One.
Harry Potter: But I AM the Chosen One.
Albus Dumbledore: Take my arm. That was fun. Most people vomit their first time.
Dumbledore: Oh, to be young, and to feel love's keen sting.
Hermione: Excuse me, I have to go and vomit.
Ron: [Talking about Lavender] All she wants to do is snog me. My lips are getting chapped. Look!
Harry: I'll take your word for it.
Hagrid: Seriously misunderstood creatures, spiders are. It's the eyes I reckon. They unnerve some folk.
Harry: Not to mention the pincers.
Arthur Weasley: Times like these, dark times, they do funny things to people. They can tear them apart.
Ron Weasley: I'm in love with her!
Harry Potter: Alright. Fine. You're in love with her. Have you ever actually met her?
Ron Weasley: No. Can you introduce me?
Harry Potter: Professor, you knew Voldemort. You were his teacher. What was he like?
Horace Slughorn: Dumbledore put you up to this, didn't he?
Albus Dumbledore: Once again, I must ask too much of you Harry.
Harry Potter: Did you know, sir? Then?
Albus Dumbledore: Did I know that I just met the most dangerous dark wizard of all time? No.
Albus Dumbledore: You must be wondering why I brought you here.
Harry Potter: Actually sir, after all these years I just sort of go with it.
Answer: The purpose of the Pensieve is to preserve the memory exactly as it was recorded. Telling Harry something years after an event occurred is not as effective or as accurate as seeing. It is more impactful if Harry can watch events exactly as they unfolded. Regarding Slughorn, he had refused to give his complete memory because he was ashamed of the unintentional part he played in Voldemort's plan to create the Horcruxes. He was duped by Riddle, but he still did not want anyone to know how foolish he was.
raywest ★