"I am the prince Aemon Targaryen! I am the Lord of Winterfell!"

- Jon Snow during his childhood, ASOS

Sansa wishing for a hero to cut Janos Slynt's head.

Tyrion talking to Oberyn about Viserys II and the allegations he poisoned his nephew. Not realizing Tyrion will be in the exact same situation not so long from now.

The prince laughed. "Viserys hardly reigned a fortnight."

"He reigned more than a year," said Tyrion.

Oberyn gave a shrug. "A year or a fortnight, what does it matter? He poisoned his own nephew to gain the throne and then did nothing once he had it."

"Baelor starved himself to death, fasting," said Tyrion. "His uncle served him loyally as Hand, as he had served the Young Dragon before him. Viserys might only have reigned a year, but he ruled for fifteen, while Daeron warred and Baelor prayed." He made a sour face. "And if he did remove his nephew, can you blame him? Someone had to save the realm from Baelor's follies."

"My lord father is waiting for you, your grace"

• When Jon and Arya are talking about Joffrey’s arms and Arya makes a comment about a wolf with a fish in its mouth — later Nymeria draws Catelyn out of the water
• Same chapter when Arya asks Jon why he’s not out in the yard with the other boys and Jon says it’s because bastards aren’t allowed to hurt little princes — he’s referring to Joffrey but we find out later in the book that Joffrey is a bastard. The whole exchange is really clever and tongue in cheek
• Last from the same chapter but when Jon and Arya are talking about the unfairness they face as outcasts. Jon says girls get the arms but not the swords while bastards get the swords but not the arms. This one is partially fulfilled since Jon gives Arya a sword a few chapters later. But then there’s been a theory for a while that Arya will get Robb’s crown from Stoneheart and then pass it on to Jon when they meet again, thus fulfilling it.

It’s crazy how this one chapter is loaded with symbolism and foreshadowing. All of AGOT is, really.

Foreshadowing the real killer of Jon Arryn in the very first book.

“I did hold Tyrion Lannister, but no longer,” Catelyn was forced to admit. A chorus of consternation greeted the news. “I was no more pleased than you, my lords. The gods saw fit to free him, with some help from my fool of a sister.” She ought not to be so open in her contempt, she knew, but her parting from the Eyrie had not been pleasant. She had offered to take Lord Robert with her, to foster him at Winterfell for a few years. The company of other boys would do him good, she had dared to suggest. Lysa’s rage had been frightening to behold. “Sister or no,” she had replied, “if you try to steal my son, you will leave by the Moon Door.” After that there was no more to be said.

"You'd best pray that it's a wildling blade that kills me, though. The ones the Others kill don't stay dead... and they remember. I'm coming back, Lord Snow."

This line goes crazy.

"He does so love his work..."

-Varys, AGOT Eddard XI

Precisely I was talking about this very same thing with another user a few days ago, so I will copy paste my previous fav quotes:

One player, the "lord of the crossing," stands in the middle of the bridge with a staff. When another player approaches, the lord of the crossing must say "I am the lord of the crossing, who goes there?" The player who approaches must then present his reasons for crossing the bridge and why he should be allowed to cross. The lord asks the player questions and makes them swear oaths. The player does not have to respond truthfully to the questions but the oaths are binding unless the player says "Mayhaps" quickly enough that the lord does not notice.

And then George gives us such hidden little gems like this:

"Enough," Lord Walder broke in. ""You may weep and whisper after you're wed, heh. Benfrey, see your sister back to her chambers, she has a wedding to prepare for. And a bedding, heh, the sweetest part. For all, for all." His mouth moved in and out. "We'll have music, such sweet music, and wine, heh, the red will run, and we'll put some wrongs aright....

"I need to see my men across the river, my lord," Robb said.

"They shan't get lost," Lord Walder complained. "They've crossed before, haven't they? When you came down from the north. You wanted crossing, and I gave it, and you never said mayhaps, heh. But suit yourself. Lead each man across by the hand if you like, it's naught to me."

Robb never said mayhaps...hence the oath (wedding a Frey bride) was binding. And when they ask for guest right? Walder offers food while saying mayhaps:

"Food, heh. A loaf of bread, a bite of cheese, Mayhaps a sausage"

Walder is implying Robb lost because he broke a binding vow, while he himself can lie because he said mayhaps: he won the Lord of the Crossing's game, replacing the previous lord (damn weasels)

The lord can knock a player into the water at any time, and he is the only one armed with a staff. Only when the lord is displaced can another player become lord, but only if they said mayhaps in the game, otherwise it means immediate disqualification

Also, the foreshadowing with the cats' quote in AGOT is wild imo:

The Red Keep was full of cats: lazy old cats dozing in the sun, cold-eyed mousers twitching their tails, quick little kittens with claws like needles, ladies' cats all combed and trusting, ragged shadows prowling the midden heaps. One by one Arya had chased them down and snatched them up and brought them proudly to Syrio Forel … all but this one, this one-eared black devil of a tomcat. " "That's the real king of this castle right there, older than sin and twice as mean. One time, the king was feasting the queen's father, and that black bastard hopped up on the table and snatched a roast quail right out of Lord Tywin's fingers. Robert laughed so hard he like to burst. You stay away from that one, child."

Lazy old cats dozing in the sun: Bran (greenseer, crippled, his wolf is Summer), quick little kitten with claws like needles: Arya (obvious why: quick, nicknamed the little sister, her sword is Needle); Ladies'cats: Sansa (Lady was even depicted with this adjectives: combed and trusting), cold-eyed mousers: Robb (he died), ragged shadows: Rickon (Shaggydog)....and lastly and most important: Balerion the cat, that represents the last remnant of the Targ rule, is a hint towards Jon's heritage, since he is nicknamed: "the real king of the castle" and is said to be a black bastard....who is called the black bastard of the Wall? Jon

There's so many great lines in JonCon's chapters.

Death, he knew, but slow. I still have time. A year. Two years. Five. Some stone men live for ten. Time enough to cross the sea, to see Griffin's Roost again. To end the Usurper's line for good and all, and put Rhaegar's son upon the Iron Throne.

The Lost Lord

"There is where you're wrong," Myles Toyne had replied. "Lord Tywin would not have bothered with a search. He would have burned that town and every living creature in it. Men and boys, babes at the breast, noble knights and holy septons, pigs and whores, rats and rebels, he would have burned them all. When the fires guttered out and only ash and cinders remained, he would have sent his men in to find the bones of Robert Baratheon. Later, when Stark and Tully turned up with their host, he would have offered pardons to the both of them, and they would have accepted and turned for home with their tails between their legs."

He was not wrong, Jon Connington reflected, leaning on the battlements of his forebears. I wanted the glory of slaying Robert in single combat, and I did not want the name of butcher. So Robert escaped me and cut down Rhaegar on the Trident. "I failed the father," he said, "but I will not fail the son."

The Griffin Reborn

I'm doing my first reread (relisten) now, and even as a show-watcher, I never caught the foreshadowing when Arya thinks about Vargo Hoat being known for chopping the hands and feet off of runaways they capture.

The man who stepped through the door was plump, perfumed, powdered and as hairless as an *Egg*.

Foreshadowing for Varys being a Targaryen (Blackfyre actually)

I love how after 15 years from the last book .. you still discover new things in a simple question on Reddit .. this series is really amazing .. shame that it didn't complete

Pale white mists rose off Alyssa's Tears, where the ghost waters plunged over the shoulder of the mountain to begin their long tumble down the face of the Giant's Lance. Catelyn could feel the faint touch of spray on her face.

Alyssa Arryn had seen her husband, her brothers, and all her children slain, and yet in life she had never shed a tear. So in death, the gods had decreed that she would know no rest until her weeping watered the black earth of the Vale, where the men she had loved were buried. Alyssa had been dead six thousand years now, and still no drop of the torrent had ever reached the valley floor far below. Catelyn wondered how large a waterfall her own tears would make when she died. "Tell me the rest of it," she said.
A Game of Thrones - Catelyn VII

At this point we know Lord Arryn was killed with Tears of Lys, but the main suspicion is still on the Lannisters. It's one of the crimes that the then-prisoner Tyrion is suspected of. But GRRM is silently screaming the real answer at us. Two books before actually making the reveal, in the scenery description of a millennia old waterfall.

The widow Arryn – she's not Alyssa Arryn but she is a Lysa Arryn – and her tears connect to the death of her husband. She had "seen her husband slain." Not like a witness, but like "I will see it done." She doesn't truly weep for him. The only tears Lysa shed for her husband were the Tears of Lys that killed him. And then of course her punishment is that she herself is made to fall from the Giant's Lance.

Young Griff's alleged mother being a Tyroshi, likely a reference to how the Blackfyre pretenders after Daeron's half-brother were the children and descendants of Rohanne of Tyrosh. It would not surprise me if GRRM chose blue as Rohanne's signature hair color in a Fire and Blood sequel.

When Stannis is camped at the frozen lake

The entire description of the lake is Frozen Giants punching their way through frozen ice.

Which is foreshadowing for something that hasn't happened yet... when those buried In The Wall are breaking their way out of it as the Wall comes down

The cyvasse scenes with Arianne like Doran putting the black onyx dragon in her hand, her losing most of her matches, and her saying she likes the dragon when Daemon accuses her of favoring it too much. All foreshadowing for her hasty and doomed marriage to Aegon (also bad at cyvasse for relying too much on his dragon piece) who is a secret Blackfyre.

"It was you killed the dog m'lady" said by Gendry to Brienne. For me is a foreshadowing of Gendry who must duel against Lem Lemonclock, his companion and the new hound. Brienne killed Rorge with the Hound helm(a dog) and Gendry will fight the next dog (Lem with hound helm) in Jaime's Lannister trial at the Hollow Hill made by Lady Stoneheart in Winds.