
Originally Posted by
El's Duelling thread
Well, I think that the main reason Lily became the ultimate exception for Severus is that because she pretty much WAS an exception in his life, from day one. She was a long list of things beginning with 'the only one ever to...'.
The only one ever to be interested in him, to be friendly to him... to accept him, basically.
Also, I think that to a ten-year-old Severus, from the moment he saw Lily, she was the ultimate contradiction. A Muggle-born, but with so much magic, and more importantly, a completely non-Muggle approach to everything. Someone cheerful by default, curious, lively and welcoming - a creature that appeared to be a complete opposite to him in so many ways. No wonder he felt irrestibly drawn to her, the more he watched. And then the impossible happened - despite the first meeting that did not turn out so well, she still accepted him as a friend.
In one of the books about the Moomins by Tove Jansson (unexpected deviation!), there were creatures, whose name I can't remember, which were drawn to fires in winter, because they were always cold. But no fire could warm them, and they would draw the fire in until it was out, and cold they would remain. Well, somehow the young Severus reminded me of that kind of creature... except the impossible happened, and Lily managed to warm him before it was too late for him.
Please pardon me my sentimentality... *sniff*
But really, I think that Severus by the age of nine had already realized the fact that he is not loved by anyone, and therefore, won't be. The best thing he could strive for would be being rewarded for doing something well or punished otherwise. And then suddenly, there is someone for whom he is not 'that Snape boy' (and those three words tell volumes about his relationship, or rather, complete lack of, with the people his age in the area) - but Severus, someone interesting, someone to be friends with.
No doubt, then, that for someone who's done something no one else has, ever, he is willing to do anything. Always.