They had been corrupted by money, and he had been corrupted by sentiment. Sentiment was the more dangerous, because you couldn’t name its price. A man open to bribes was to be relied upon below a certain figure, but sentiment might uncoil in the heart at a name, a photograph, even a smell remembered.
Graham GreenePeople change,' she said 'Oh, no they don't. Look at me. I've never changed. It's like those sticks of rock: bite it all the way down, you'll still read Brighton. That's human nature.
Graham Greene