Spoiler
Ok enough of that.
Pressure is all around. Exams, expecting Voldemort to pop out at any moment around every corner, the safety of the Stone, Quiddich... a lot of heavy weight stuff for an 11 year old kid. Especially one still relatively new in this wonderful world of Wizards and Magic. But his biggest concern is his scar. The mystery of it's burning is nearly as agonizing as Professor Snape's potions exam.
While discussing this with his two new-found friends he's struck by an idea that Hagrid might know more on the mystery of the Stone. Rushing over and speaking with him we find that Hagrid would be a terrible secret keeper. Get him going on a subject that he loves and he'll carelessly ramble on until something important slips. Such as the secret of getting past Fluffy.
Alarmed that Hagrid told a total stranger (alibet loosely plied with some grog) the secret of dealing with the dog, the three rush off to find Dumbledore. Failing that they try to post watch on their number one suspect, Snape. But having been busted several times and at the risk of losing their house more points they confine themselves to the common room. There Harry makes a fateful decision.
Remarkable young man this. In a few short moments he went from young boy winning Quiddich matches to a mature adult decision. And selfless as well. His motives are to prevent the destruction of all that he and his friends hold dear. Likewise being willing to accept the consequences should he fail in his attempt. Willing to face death and adamantly choosing the right from the wrong."Well, that's it then, isn't it?" Harry said.
The other two stared at him. He was pale and his eyes were glittering.
"I'm going out of here tonight and I'm going to try and get the Stone first."
"You're mad!" said Ron
"You can't!" said Hermione,. "After what McGonagall and Snape have said? You'll be expelled!
"SO WHAT?" Harry shouted. "Don't you understand? If Snape gets hold of the Stone, Voldemort's coming back! Haven't you heard what it was like when he was trying to take over? There won't be any Hogwarts to get expelled from! He'll flatten it, or turn it into a school for the Dark Arts! Losing points doesn't matter anymore, can't you see? D'you think he'll leave you and your families alone if Gryffindor wins the house cup? If I get caught before I can get to the Stone, well, I'll have to go back to the Dursleys and wait for Voldemort to find me there, it's only dying a bit later than I would have, because I'm never going over to the Dark Side! I'm going through that trapdoor tonight and nothing you two say is going to stop me! Voldemort killed my parents, remember?"
He glared at them.
Not too surprisingly his two friends agree to join him. They seem to be just as mature in their decision making as their friend. Realizing too the consequences they apparently decide loyalty is more important. They too are doing it for their families and others.
After a brief interruption by Neville of all people who dared to stand up to them, after all it was Ron's idea wasn't it? They make their way under Harry's invisibility cloak to the upper floors where Fluffy, they find is already asleep. Narrowly escaping getting eaten alive they find that not all their studies have been for naught. Thanks to Hermione's eagerness to pay attention in Herbology, they get past a deadly plant known as the Devil's Snare.
The next obstacle is no easier. But Harry's skill with a broom gets them through.
Next, it seems that it's Ron's turn. Here he shines and likewise takes a leadership role when it's called for. After directing his friends to their places on a giant chess board Ron moves the pieces about trying to outwit whatever magic is directing the white pieces until ...
Interesting side note. I've played chess for years and I've never known a knight to be allowed to make just ONE move forward. But I guess you can call it artistic license to get the story moved... either that... or she might've over looked it... so did the editor."We're nearly there," he muttered suddenly. "Let me think -- let me think ..."
The white queen turned her blank face toward him.
"Yes...." said Ron softly, "it's the only way ... I've got to be taken."
"NO!" Harry and Hermione shouted.
"That's chess!" snapped Ron. "You've got to make some sacrifices! I take one step forward and she'll take me --- that leaves you to checkmate the king, Harry!"
"But--"
"Do you want to stop Snape or not?"
"Ron ---"
"Look, if you don't hurry up, he'll already have the Stone!"
There was no alternative.
"Ready?" Ron called, his face pale but determined. "Here I go --- now, don't hang around once you've won."
He stepped forward, and the white queen pounced. She struck Ron hard across the head with her stone arm, and he crashed to the floor --- Hermione screamed but stayed on her square --- the white queen dragged Ron to one side. He looked as if he'd been knocked out.
Shaking, Harry moved three spaces to the left.
One more barrier to get through, possibly the most dangerous one of all. Snape's potions all laid out and a mind-bender of a logic puzzle. Yet again Hermione proves herself and both she and Harry take the correct potion, only Hermione is to go back and get help while Harry goes on alone.
Once through the fire he faces someone standing before a familiar mirror. But it isn't Snape, it wasn't Voldemort either....