One day a farmer was walking around his fields during the harsh winter months. Suddenly he came across a snake, all shriveled up and stiff from the cold. The farmer felt terrible for the snake and thus took him up and put it in his breast pocket.
Soon the snake began to warm up and revive, and once he had enough energy, he bit the farmer on his chest and ended up poisoning him. The man had learnt his lesson, but it cost him his life. You should never extend kindness to a rogue.