"The trouble is," said Miss Marple, "that people are greedy. Some people. That's so often, you know, how things start. You don't start with murder, with wanting to do murder or even thinking of it. You just start by being greedy, by wanting more than you're going have." She laid her knitting down on her knee and stared ahead of her into space.That is so often the definition of sin, isn't it? Wanting more than you're going to have. And then trying to get it leads to big, big trouble.
Agatha Christie, The 4:50 from Paddington