Sirius Black: PoA Quote

[vmonte]

No: HPFGUIDX 135696

Page 370, U.S. paperback edition

Sirius to Peter:
"I'll tell you why," said Black. "Because you never did anything for 
anyone unless you could see what was in it for you. Voldemort's been 
in hiding for fifteen years, they say he's half dead. You weren't 
about to commit murder right under Albus Dumbledore's nose, for a 
wreck of a wizard who'd lost all of his power, were you? You'd want to 
be quite sure he was the biggest bully in the playground before you 
went back to him, wouldn't you? Why else did you find a wizard family 
to take you in? Keeping an ear out for news, weren't you, Peter? Just 
in case your old protector regained strength, and it was safe to 
rejoin him..."

vmonte:
Did Snape switch sides because he realized that Dumbledore was on his 
last legs?

Vivian