“Your head ain’t made of straw, you know.”
Hunk is the farmhand in Kansas who will become the Scarecrow in Oz and this is his way of telling Dorothy that she’s smart enough to figure out a way around her conflict with Miss Gulch and the old woman’s hatred of Toto. This is also obvious foreshadowing to the fact that Hunk will turn into the Scarecrow (someone whose head, is, indeed, made of straw) when Dorothy reaches Oz.
“If you don't hand over that dog, I'll bring a damage suit that'll take your whole farm!”
Not only does this quote make it easy to see how Miss Gulch gets transformed into a witch in Dorothy’s fantasy of Oz, it also highlights how unjust Miss Gulch is in dealing with the feelings of a little girl. She abuses her powers in the community in order to seek vengeance on the innocent Dorothy. This line shows just how evil Miss Gulch really is.
"I'll get you, my pretty...and your little dog too!"
This is one of the most iconic lines in film history, and is chilling in its wickedness. In Munchkinland, the Wicked Witch threatens Dorothy that she will seek her revenge for the death of her sister, no matter what, and that she will destroy Dorothy's dog as well. Adding to the line's wickedness is Margaret Hamilton’s spot-on delivery: venomous, terrifying, and followed by a high-pitched cackle.
"Toto, I've a feeling we're not in Kansas, anymore."
This is another iconic line from the film. Dorothy murmurs it to Toto when they arrive in Munchkinland, an obvious understatement of just how uncanny this new world really is. The strangeness and whimsical qualities of Oz are almost unimaginable, and Dorothy notices right away.
“Pay no attention to the man behind the curtain.”
When the group returns to the Emerald City after killing the Wicked Witch, the large head of Oz tells them to come back the following day, which greatly disappoints them. As they complain about the Wizard's procrastination, Toto pulls back a nearby curtain, revealing that "Oz" is just a man operating some machinery in the corner. Trying to maintain his cover, Oz utters this line into the microphone, hoping to steer the group's attention away from his sleight of hand.
"I'm afraid you've made a rather bad enemy of the Wicked Witch of the West"
Glinda makes this rather obvious statement to Dorothy after the Wicked Witch has left and threatened to get revenge on her for killing the Wicked Witch of the East.
"Some people without brains do an awful lot of talking, don’t they?"
When she first meets the Scarecrow, Dorothy notes that he can talk, in spite of the fact that he told her he doesn't have a brain. By her logic, it's impossible for a scarecrow to talk without a brain, but the Scarecrow makes this ironical and witty statement in reply. He suggests that plenty of not-very-intelligent people like to talk a lot, and Dorothy cannot help but concede that he's right.
"How about a little fire, Scarecrow?"
When she and her guards have cornered the group in her castle, the Witch lights the tip of her broom on fire and brings it towards the particularly flammable Scarecrow. This line is proof of her deep evil. Little does she know that her antics with the fire will lead to her own demise in a few moments.
"Because she wouldn’t have believed me. She had to learn it for herself.”
This is Glinda’s reasoning for holding back on the fact that the ruby slippers can transport Dorothy back to Kansas. The Scarecrow asks Glinda why she didn't tell Dorothy earlier that she could get back to Kansas, and Glinda responds with this statement. She wanted Dorothy to learn something while she was in Oz, and she didn't want to just make things easy for her.
"There's no place like home."
This line is often highlighted as the overarching theme of the movie. After Glinda gets Dorothy to say what lesson she learned in Oz—that what she was looking for was no farther than her own backyard—Dorothy clicks the heels of her ruby slippers together and utters this line, a kind of mantra that will send her back to Kansas a little wiser.
