" It had always struck her as wrong that we should judge ourselves-or, more usually, others-by single acts, as if a single snapshot said anything about what a person had been like over the whole course of his life. It could say something, of course, but only if it was typical of how that person behaved; otherwise, no, all it said that at that moment, in those particular circumstances, temptation won a local victory. "

― Alexander McCall Smith , The Comforts of a Muddy Saturday (Isabel Dalhousie, #5)