My guess was that Quirrell was already possessed by Voldemort, and that both events happened to Quirrelmort roughly as he described, the first with him acting under the identity of Quirrell and the second with him openly identifying as the Dark Lord.
My guess was that Quirrell was already possessed by Voldemort, and that both events happened to Quirrelmort roughly as he described, the first with him acting under the identity of Quirrell and the second with him openly identifying as the Dark Lord.